Boost your Skills with the power of Knowledge | KITS Online Trainings

Boost your Skills with the power of Knowledge

Do you want to boost your skills and knowledge w.r.t the time? Are you searching for the right place? Then stop surfing and start learning here. Join us to upgrade your skills as per the market trend. Kits real-time experts give you the best practical knowledge on various IT platform with real-world use cases and shows you the way to become a certified professional.

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Business Analysis Online Training | KITS Online Trainings

Business Analysis Online Training
Get hands-on expereince on Business Analysis from roots to the advanced levels by real-time working professionals through KITS Online Training     

9 mins
Search Engine Optimization (SEO) Course | KITS Online Trainings

Search Engine Optimization (SEO) Course
Enroll for the best SEO Online Training Course offered by KITS to get ranked for your website on the top of search engine like Google

9 mins
Tosca Testing Online Training | KITS Online Trainings

Tosca Testing Online Training
Become a master in Tosca testing from the roots to the advanced level taught by real-time working professionals with real-time use cases at Tosca Testing Online Training.

9 mins
Oracle BPM Online Training | KITS Online Trainings

Oracle BPM Online Training
Get hands-on exposure in the creation of genuine Oracle Business Process Management applications with Oracle BPM by real-time experts. By the end of this training, you will get practical exposure to d

9 mins
Oracle Apps Technical Course | KITS Online Trainings

Oracle Apps Technical Course
Enroll today for the best Oracle Apps Technical training o to involve in the application programming of the oracle corporation. By the end of the course, you will acquire practical exposure to oracle

9 mins
Oracle Apps Functional Online Training | KITS Online Trainings

Oracle Apps Functional Online Training
Enroll for Oracle Apps Functional Online Training Course to become a specialist as an Oracle Apps Functional Consultant. Throughout this course, you will be gaining practical exposure to operation and

9 mins
Microsoft Dynamic CRM Online Training | KITS Online Trainings

Microsoft Dynamic CRM Online Training
Make your dream come true as a Microsoft Dynamic CRM developer by developing your skills and enhance your knowledge on various application modules, customization, configuration, integration by live in

9 mins
Installshield Training | KITS Online Trainings

Installshield Training
Acquire practical knowledge of creating installers (or) software packages as per the latest library using Installshield by live industry experts with practical use cases and makes you master in creati

9 mins
Build and Release Online Training | KITS Online Trainings

Build and Release Online Training
KITS Build and Engineer Online Training Course taught by live industry experts enhances your practical knowledge on the build and release concept and process, DevOps Concept, and process through pract

9 mins

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Linux Online Training | KITS Online Trainings

Linux Online Training
KITS instructor-led online course will help you with the necessary skills to become a successful Linux Administrator. KITS Linux online training course will help you in imparting the practical knowled

9 mins
Testing Tools Online Training | KITS Online Trainings

Testing Tools Online Training
Acquire hands-on experience of the various testing tools taught by real-time working professionals through hands-on exercises and real time project projects and become an expert in Testing tools.

9 mins
Oracle DBA Online Training | KITS Online Trainings

Oracle DBA Online Training
KITS Oracle DBA Online Training imparts you to gain the skills and the knowledge required to install, configure, and administer the Oracle Databases. Through this course, you will master in creating a

9 mins
RPA Online Training | KITS Online Trainings

RPA Online Training
Get the application of automation on different applications using a variety of automation tools like blue prism, automation anywhere, UI path through hands-on and real-time project implementation at K

9 mins
Python Online Training | KITS Online Trainings

Python Online Training
Master in coding the application from roots to the advanced level on python programming by live experts with practical use cases through the KITS python online training course. This course lets you kn

9 mins
Oracle SOA Online Training | KITS Online Trainings

Oracle SOA Online Training
Hurry up to enroll for the demo session to become a certified Oracle SOA professional through KITS Oracle SOA Online Training Course  taught by real-time industry experts with practical use-cases and

9 mins
Web Methods Online Training | KITS Online Trainings

Web Methods Online Training
KITS web methods training help you in mastering architecture, integration tools, components, advanced web services by live industry experts with live use cases. This course improves your skills and pr

9 mins
JAVA  Online Training | KITS Online Trainings

JAVA Online Training
Get from the roots to the advanced level of programming on Java taught by live experts and acquire hands-on experience of java programing taught by live experts with practical use cases and become a m

9 mins
Data Science Online Training | KITS Online Trainings

Data Science Online Training
Make your dream come true as a Data Scientist by enhancing your skills through Data analytics, R programming, statistical computing, machine learning algorithms and so on by live use cases taught by c

9 mins

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What are the popular DevOps tool in 2021? | KITS Online Trainings

What are the popular DevOps tool in 2021?

Agile is the most important principle for any software operation to work.  And the Development, as well as the Operations teams, should work together to the agility of the process. The Traditional approaches fail to produce continuous development and the integration process in the software development life cycle. Then the DevOps came into existence to enable the continuity for the development and integration process and also to increase the agility of the software process.  If you think of DevOps as a tool to establish the integration for development and integration process then you are wrong. Check our previous blog on What is DevOps to know the complete details on it. Today many tools were depending on these principles and many firms were using those tools for software development. Do you wanna know what are the popular DevOps tools ?. Then read the complete article on Popular DevOps tools in 2021. The term DevOps can be described in many ways. One among them was: DevOps is a set of principles defined to enable continuous development, continuous testing, continuous integration, and continuous deployment and continuous delivery of the software process. Top DevOps Tools in 2021: Today many tools that we were using were dependent on these principles. Some of them were: 1.Docker:   Docker is a tool for containerization. This Linux –based Open-source platform focuses on containers. i.e With this tool, you can package the required software along with its dependencies as a single unit. Hence with the utilization of this tool, the user need not struggle with the depending packages everything will be taken care of by the tool itself.  This tool is portable and highly secure and allows you to use any language in it. The advantage of this tool is it allows secure packaging and deploying and also allows the running of the application irrespective of the software platform. Moreover, we can easily integrate this tool with many other tools like Jenkins, Ansible, and Bamboo. 2.Ansible:  It is one of the most effective IT orchestration and configuration management tools in the market.  When compared with its competitors, ansible offers a software look and does not hog on your devices in the background.  This tool is primarily used for pushing the new changes within the existing system as well as configuring the newly deployed machines.  Today many IT firms were using this tool due to for lowering the cost of the infrastructure and increasing replication scalability are the two major reasons. 3.GIt: It is another highly popular open-source DevOps tool used by industry giants like  Microsoft, Facebook, and so on.  This tool allows you to track your work development and enables you to coordinate with your team members.  This tool is easy for experimenting with because with this tool you can easily revert to the earlier versions. This tool allows developers to make rapid iterations to the code and the notification is sent immediately to the team members. Besides this tool allows the users to create branches and add those new features when they are ready. Here, you need to host the repository for work such as Git Hub. Would you like to know more practical knowledge on Git? Visit DevOps Online Training 4.Puppet: This DevOps tool lets you manage and automate software inspection, operation, and delivery.  This open-source tool has a solid track record and thousands of modules are easily integrated with many other platforms. For small projects, you can use this software free version and can go with the Enterprise versions for large projects. This Enterprise version lets you manage multiple teams and thousands of resources. 5.chef:   This powerful open-source configuration management tools let you turn the infrastructure into code to manage data, attributes,  roles, environment, and many more. Like a puppet, this tool supports multiple platforms and easily integrates with cloud-based platforms.  Irrespective of the size of the infrastructure, this tool is capable of automating the infrastructure configuration and the application deployment as well as manage the configuration across the network. 6.Jenkins: It is an open-source integration server, that allows you to automate the complete build of the software project. This tool is popularly used for finding the issues in the code. Besides,  it is responsible for automating the delivery pipeline and lets you test and report the changes in real-time. Due to its plugin-based ecosystem, it can easily be integrated with every other  DevOps tool. Today most of the tasks and the tools involved in SDLC can be automated using Jenkins and allows its team members to increase the throughput. 7.Nagios:   It is the best open-source monitoring tool. It allows the users to find and correct the problems in the network and the infrastructure. This tool has two editions Nagios Core and Nagios XI. Among those Nagios XI offers greater functionality.  You can use Nagios to monitor the applications, services, network protocols, and many more. And the forum support is available in both versions. 8.Kubernetes:  It is relatively a new orchestration platform that lets you manage hundreds of containers.  With this tool, you can deploy the containerized apps to a group of computers, and Kubernetes automates their distribution and scheduling.  Users can use the Kubernetes and Docker together where Kubernetes is used as an orchestration platform and docker lets you build, distribute and run containers and the docker lets you build, distribute and run containers. 9.Vagrant:  This tool allows the user to build and manage the virtual environments in a single flow whether you are a developer, designer. Here you will have the simple workflow as everyone in the team.  This open-source tool aims to mirror the production environment where the bugs can be fixed early in the production process.  Moreover, this tool can be easily integrated with chef, puppet ansible, and many more 10.Maven: This is an open-source tool from Apache that automates the build process and the resolution of dependencies.  This tool is primarily used for java objects.  This tool is based on the concept of the project object model that relies on XML and has predefined targets for performing the common tasks. Today most of the Maven functionality comes with plugins. Likewise, many tools depend on the DevOps principles. By reaching the end of this blog, I hope you people have got enough knowledge on  DevOps tools. You people can get the practical knowledge on these tools taught by industry professionals through DevOps Online Course. In the upcoming post of this blog, I'll be sharing the details on each tool in a separate post. Meanwhile, you people can check out our DevOps Interview Questions.

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What is Oracle SOA? | KITS Online Trainings

What is Oracle SOA?

An application can be developed in multiple ways. For instance, in some cases, an application can be developed using a different platform as per the requirement of the client.  Even though the application development on different platforms produces the same result the cost of the development varies. Moreover, the add-ons to the application on different variations in different parameters like cost, time, execution completion, and so on. Additionally, code reusability is also a deciding factor to execute an application on that particular platform. This code reusability is useful for any kind of front (or) backend application. Today the need to integrate with different cloud platforms, mobile-enabled the existing applications, and the initiation of latest trends by connecting the Internet of Things (IoT) to the current infrastructure is the main focus of any organization. Hence Oracle SOA is the perfect platform to integrate the on-premises and cloud deployments for ensuring the perfect flexibility of the organization Hence let us start our discussion with What is Oracle SOA? Oracle SOA Suite enables developers to build services and manage them. The services here can be applied to the business process and the composite applications. Today the organizations can easily extend and evolve the architectures with hot-pluggable components from the oracle suite. Moreover, with the utilization of Oracle SOA, the replacement of existing requirements will not be required. Here the oracle corporation will share the product strategy, product details, as well as customer experience relating to the Oracle Suite. This Oracle SOA Suite was initially started in June 2014 and 12C is the latest version. The development of the Oracle SOA suite was done to cope up the goals of infrastructure flexibility, business integration, increased applications, and the reduced costs. Why SOA? The Oracle corporation has brought SOA due to the following reasons: Today IT firms should be able to take the challenge of interacting with an array of software systems that may not be compactable under all the circumstances. Hence IT firms need to face the demands by putting forward with a wide array of customers. Here the customers are accessing the products and services through online interfaces that are a part of supply chain management, where the cost and the time of production need to be decreased. Hence IT Companies were looking for solutions to meet the demands.  The main reason for the implementation of SOA is to have a standard for the representation of software products. Even though SOA is not a completely new concept but it has many standard setups by the internet like HTTP and HTML. Today the businesses that have a mandatory need for the internet were using similar principles to get the computer systems linked. Would you like to get a more practical explanation on Oracle SOA visit Oracle SOA Online Training Reasons to use Oracle SOA: The following are the reasons to use Oracle SOA. Re-use of Service costs involved in testing and developments can be lowered by the utilization of existing server modules when compared to the new ones. And this would ensure the low maintenance cost and better savings. Messaging: The use of messaging would enable services to move among the computer systems inside the enterprise.  Moreover, the externally provided services were easy to use.  Here the messages handled by the services can be changed to meet the new demands else the performance can be tuned. Message Security: It involves data integrity with the addition of cryptographic integrity check fields and data confidentiality with the encryption of messages. Complex event processing:  It offers various fields like Ability to adapt to different scenarios:  Here the focus needs to put on the logic that connects the scenarios to the business events. Simplification of Complex Architecture: It involves removing the business functionalities from the business software that are not related Improvement of Security and management: Here the security event detection and performance measurement were the keys   How SOA Influences technology? Even though SOA is not a technical concept, this idea has been adopted by most of the technologist. Moreover, the concept of software services has been established through SOA. And the concept is established by a software program.  Here the SOA efforts offer value to the people (or) the organization that consumes software products. Here the services on the web could have virtual interfaces. And the internal network of enterprises can also be used for delivering the software devices.  The below are the major benefits in the utilization of service are as follows: a)The larger application was much like information silos where a ready exchange of information is often not possible. b)Fine-grained software services offer a better and the refined flow of information among the companies. c)In terms of integration, Oracle SOA proves to be inexpensive while the major application moves to be costly. d)If the internal software is organized as the services exposing the functionality externally is easier. Here the increased visibility will offer the business value. Hence this helps in increasing customer satisfaction and also reduces the cost. e) Here the supporting software makes the businesses rely on them. Here the large and the singular programs can be hard to change as a lack of modularity where it is difficult for the enterprises to meet the changes. f) In some cases, it might even lead to the inability to take the advantage of new opportunities. A software architecture based on the service is easy to change as it offers better organizational benefits and helps to avoid penalties. What are the features of SOA? This platform helps to integrate with other platforms. Here the unified platforms meet the growing demands of faster business integration. Moreover, the suite is capable of supporting all the technology trends today. Moreover, the adapter was classified into different categories like enterprise application, CDC and mainframe, cloud, and the Oracle SOA suite adapters depending on the systems and the applications. The features of Oracle SOA are as below: Cloud Integration Adapters:   One of the most exciting features of cloud integration adapters is that it offers simplified connectivity and Saas application through processing options and design time wizards. Besides, it contains room for requirements that requires the architecture for web services and cloud adaptor configuration wizard. Besides the SDK allows users to use new SaaS applications as a part of the business process of the companies. Here the SDK offers the run time and the design-time components. The run time API includes security API, Session API as well as transformation API. On the other hand, design-time components include metadata browsing, connection API, artifact generation, and connection support. Unified Run time and Design-time Environments: The Oracle WebLogic server offers a platform for the Oracle suite. Here the integrating components offer a reliable integration. Here oracle allows the deployments of more applications on the server that reduces the hardware and the energy cost as well as the software licensing. End to end Monitoring: It is very important to keep a note of what is happening in the application servers, occupant applicants, and the application scaling, whenever necessary for managing the integration.  Here the SOA management plugin and the Oracle Enterprise manage offer the capabilities in the web console. The users here can browse the applications, servers as well as service engines to troubleshoot the runtime problems in SOA. Likewise, there are many features of Oracle SOA. You people can get practical exposure to Oracle SOA from beginner to the advanced level through the Oracle SOA Online Course. In the upcoming post, I'll be sharing the benefits of Oracle SOA. Meanwhile, have a look at our Oracle SOA Interview Questions  

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What is Workday? | KITS Online Trainings

What is Workday?

Workday is a cloud-based vendor that specialized in Financial Management and human capital management  applications.  This vendor releases its first product in 2006. The first product is known as Human Capital Management. In the next years, it releases various products like Financial suite, Financial management. This workday HCM has worked over years, to make the financial software more competitive with other ERP systems by adding various features like budgeting, planning, analytics as well as support for larger enterprises. In the year 2013, Worday added big data analytics, prepackaged analytics tools which combine workday from third party resources. In addition at the same time, this plaform also releaed workday student. Its custom reporting tool released in 2014, provided multidimensional financial, operational reporting, and analysis designed to be scalable for large enterprises. In the same year, this vendor has released workday recruiting. Workday applications that launched in 2016, allow the workday users to apply predictive analysis and machine learning to workday HCM and financial data.. This workday forecasting, budgeting and planning helps to unify the HR Finanacial analytics and planning according to the vendor. In the same year, it adopted the IBM cloud for software development and testing. At the same time, it also reveals its partnership with Microsoft to integrate HCM and financials with office 365. Workday uses to seat on a single cloud-based database to both HCM and financials to provide better integration and embedded business functions than the ERP System. Time being it added other components of HCM, talent management, and finance to its suite.  Moreover, it released the versions for specialized markets such as higher educations as well as the government. What is Human Capital Management (HCM)? Human Capital Management is responsible for managing the crucial properties of an organization. i.e its people.This HCM platform contains all the activities from hiring an employee to retaining them. Human Capital Management is responsible for managing all the HR activities like Financial management, Human Capital Management, performance management, planning, etc.  This platform suits best for almost all kinds of business, especially for companies that have multiple locations. This platform is a one-stop solution for onboarding, recruiting, benefits, time off and analytics, compensation benchmarking, etc.  This platform is user-friendly, global system software that offers the latest version to the customers both on the browser as well as the mobile.  Would you like to know more feature on HCM? Visit Workday Online Course Features and Services of the workday : This workday has the following features and services as mentioned below: Human Resource Management (HRM):  HRM allows companies to manage and organize their workforce effectively. Besdies the self-service functionality for managers and employees and managers, it also includes various additional features like compensation management and absence management. Recruiting:  This platform recruiting solution helps organizations to find, share, engage and select the best internal and external candidates for the organization.  This platform is responsible for acquire true visibility through the entire talent acquisition process and can get the best talent. Talent Management : It is the practice of searching, keeping as well as training the employees, who were best suitable and meeting the requirments as well as the goals of the company. The main objective of this talent management, is to recruit the top affordable employees where the company can achieve the maximum potential growth for the success. Time Tracking: This feature was designed to work flawlessly with Human Capital Management, payroll as well as the work management to deliver the smooth experience through the internet as well as the mobile devices. Through this feature, it is easy for the employees to enter the time check-in (or) check out quickly on any browsers (or) a mobile devices. Workforce planning and Analytics: This feature provides an authority to the business leaders to take the better and informed decisions regarding the business crucial issues. With this feature, it is possible to analyze the capability, cost as well as the ability of the people where the resouces  can be enhanced and the correct planning could be developed to achieve the organization business objective. Payroll Solution: This is a flexible feature that allows you take the complete control of the payroll process, data as well as the costs. This platform provide payroll software for enterprise requirements for the US as well as the Candian Companies. Besides, it also provides a powerful calculation engine that supports unlimited pay groups where the companies can regain and act on the payroll data isntanttly when ever required. Learning and Development: With working learning and development feature, it is possible to engage the employees at any phase of the career through learning experiences, that can be acceses on any device.  With this feature the employee can manage all the aspects of learning including the information as well as the compliance training. Advantages: The utilization of Workday platform has the following advantages: a)This platform enables 24*7 access to the information over the secure network. b)This platform provides an easy to use access for the routine personnel items and also to make the personal information updates. c) Worday platform allocates executives, managers and administrators ready access to the current information about their teams d) This platform simplifies and automates the entry of the academic personnel to ensure correct track and the rank were entered in the system. e) Workday platform eliminates the need to build and maintain side and departmental shadow systems f) This platform is capable of introducing new HR and the payroll features and capabilities through Workday periodical updates g) This platform is capable on working on PC’s and Mac’s h) This platform has been successfully implemented / being implemted in many places like College, Universities etc. Likewise, there are many features of workday for many organization today. In the upcoming post of the blog, Ill be sharing the details of each feature with examples in real world industry.You can acquire the practical knowledge on workday feature from ground to the advanced level through Workday Online Training. Through this course, you will be acquiring real-time knowledge on workday .  

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What is Workday? | KITS Online Trainings

What is Office 365?

Microsoft is the largest and the oldest vendor started offering its products like Word, PowerPoint, excel from 1974. Today every computer user was very familiar with these Microsoft products. This is one of the most popular software suites in the world. These suites were being used by 1.5billion people worldwide. If you take the analysis of the past 3 decades, we cannot find a person who uses the computer without the office 365 suite. Millions of modern businesses rely on the Microsoft suite to communicate, create documents and balance the products. There are many hidden Microsoft products that many people were not aware of with the release of office 365.  What is Microsoft office 365? Microsoft office 365 is a suite of cloud-based productivity and applications that integrates all the existing Microsoft applications into a cloud service as a main communication and collaboration applications. Office 365 is a subscription-based version of the Office 365 suite where you have a few options when purchasing the account. Office 365 personal gives you a single user full access to every office application. On the other hand, the office365 home is designed for families where multiple people will be using the office 365. But, office 365 has several advantages that aren’t available with the Microsoft office suite. For an instance, the subscription to Microsoft office includes excellent features like Translator, Resume assistant, and smart lookup.  Here you can also collaborate with others in excels via co-authoring feature that lets you edit your workbook in real-time. Besides Office Mobile apps comes with more features when you subscribe.  For instance, you can do things like inserting page breaks, use more colors (or) making pivot tables with excel.  In the free version of the mobile apps, it allows you to perform basic tasks like creating a file, entering the text. The other advantage of using office 365 for business is the access to  SharePoint online. This service includes some of the versions of office 365 that allow you to share and collaborates with others whether they are colleagues (or)customers. Here, this service allows you to set up permissions to any one of the organizations irrespective of the location. With the frequent subscription of office 365, the customer does get updates of the latest software, bug fixes updates. Are you looking to get practical knowledge on office 365? if so, visit Office365 Online Training How office 365 is different from Microsoft 365? Office 365 is different from Microsoft 365  in the following manner: a)Office 365 is a cloud-based suite of productivity, while Microsoft 365 is a package of services that includes all the tools along with other business tools. b)A user can subscribe to office 365 without subscribing to Microsoft 365. But all Microsoft users do have access to office 365. c)Microsoft 365 was developed to give business access to all the baseline tools they need to run their business infrastructure and secure their business What are the apps and services does office 365 for business include? Depending on the subscription you take in office 365 the apps and the services vary in your account.  But core apps and services were included in office 365. Some of them are word, excel, PowerPoint, outlook, one-note, Exchange, Share Point, Skype for business, One Drive for business, and so on. Why Should companies use office 365? Due to the extreme feature of office 365, this suits best for both individuals as well as the corporate purposes. The reason why the companies use office 365 are as follows: a)To provide proactive protection against downtime. b)High system maintenance to ensure high-performance operations. c)To protect the system against security vulnerabilities. Benefits of office 365: The utilization of office 365 has the following benefits. They are: Explore and Integrate: Office 365 integrates easily with Microsoft Office and other Microsoft programs.  It just takes few minutes to create a trial account, where the users can test and integrate with the cloud. Collaborate Anywhere and Anytime: With office 365, users can get web-enabled access to email, documents, calendars, whichever device (or) the browser they use. This accessibility enables unified collaboration among employees. Stay up and Running Always: By running your applications in the cloud and storing your data, you ensure all your business documents and applications such as email will always be available. Flexibility: With multiple options in the office 365 suite, enterprises buy only the office solutions they needed and convert the CAPEX to OPEX. Single Sign-on: Users can store their password in the system tray of the machine to avoid repeatedly signing in. Support: With Microsoft support, support users can receive a business class service through admin support, with a 99.9 % uptime guarantee, geo-redundant data centers, disaster recovery, robust security, privacy controls, and standards. Security Compliance: It has built-in security and continuous compliance. Through office 365 where the data is and who has the access to it. You can also wipe all your data remotely from your mobile device if it is lost (or) stolen. No licensing issues: Office 365 includes all the licensing and it can be deployed worldwide. It means everyone has the same version of Microsoft office and all receive the updates at the same time. Get Organized: When you use office 365, email, contacts, and calendar all are synchronized. The updated contact on your mobile will be automatically updated across the devices. Here you can also access the same data from any device (or) save the document on your PC and continue working on it through the smartphone (or) tablet. Real-time Collaboration: It allows the team to collaborate with various Microsoft products like Word, Excel, and PowerPoint. Users can see the real-time edits, (or) additions to the document. It automatically saves each version to its early version easily. This ensures a quicker and simpler collaboration between the employees and departments that results in improved productivity. Likewise, you can enjoy more benefits, when you work with office 365. By reaching the end of this blog, I hope you people have gained good information on office 365. You people can acquire practical knowledge on these products taught by industry professionals at Office 365 Online Course.  In the upcoming post of this blog, Ill be sharing the details of the utilization of various Microsoft products in details.   You people can also check our Office 365 Interview Questions and get placed in a reputed company.

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What is Workday? | KITS Online Trainings

What is Linux?

Linux is the widely used operating system that is used in most security areas like banking across the globe. Many firms use this operating system to enhance security and increase data confidentiality from hackers. Even though many operating systems were available in the market, the importance of this operating system has not decreased in the market. Do you know why? Read the following article to know the details Let's start our discussion with, What is an operating system? An Operating system is software that manages all the hardware resources, associated with a laptop(or) desktop. This operating system is responsible for managing the communication between the software as well as the hardware. Moreover, no software would work without an operating system. What is Linux? Similar to Windows and iOS,  Linux is an operating system. It is one of the most powerful platforms available on this planet. As an operating system, the Linux software sits below the other software on the computer. This software receives requests from those programs and relays these requests to the computer hardware. This platform was designed similar to the UNIX and is capable of running on a variety of platforms from phones to supercomputers. Since Linux operating system is open-source, the combination of software may vary among the Linux distributions. Know more on Linux from real-time professionals at Linux Online Training What is the benefit of the Open Source Operating system? a)It has the freedom to run the program for any purpose. b)It has the freedom to study how the program works and allows the user to make the changes c)It also allows the user to distribute the modified versions to the others. What does the Linux Operating system consist of? The Linux operating system comprises of several pieces. They are: a)Boot loader: This is a software that manages the boot process of the computer. For most users, it might be a splash screen that pops up and eventually goes away to boot an operating system b)Kernel: This is the core of the system that manages CPU, memory, and peripheral devices. It is the operating system's lower level. c)Init System: This is a subsystem that bootstraps the user space and is charged with the controlling daemons. Systemd is one of the most widely used init system. This system is responsible for managing the boot process once the initial booting is handed over from the boot loader. d)Daemons: These are the background services that startup during the boot (or) when you log in to the system. e)Graphical Server: This is the subsystem that displays graphics on the monitor. It is commonly called the ‘X’ Server (or) X. f)Desktop Environment: This is a piece that the users interact with. They are many desktop environments to choose from. Each desktop environment includes built-in applications such as file managers, configuration tools, web browsers, and games. g)Applications: Desktop environments don’t offer a full array of apps. Just like windows and Mac Os, Linux offers thousands of applications that can be easily installed. How Linux is different from other operating systems? In many ways, Linux is similar to the other operating system that you have used before. Like another operating system, Linux has a graphical interface and has rich software like word processors, photo editors, video editors, and so on. In the most number of ways, the software creator has made the Linux version of the same program to use on the other systems. On the other hand, Firstly, Linux is an open-source operating system. The code used to create Linux is free and is available for the users to view, edit for the users with appropriate skills. Even though the core pieces of the Linux operating systems were the same, many Linux distributions include different software operations. Linux users can choose the core components such as display graphics and other user interface components. What are the Linux distributions? Many agencies modified the Linux operating system and make their systems. This operating system is available in the different distribution in the market. It provides different flavors of Linux operating systems to the users.  Any user can choose any distribution according to the needs. Some of the popular Linux distributions are  Ubuntu, Fedora, Linux Mint, Debian, centosos, and many more. For beginners, ubuntu and Linux mint were extremely useful. And for a proficient developer, Debian and Fedora will be a good choice. How to use Linux? We can use Linux as an interactive user interface as well as from the terminal. Different distributions have different distributions but almost all the commands will have the same behavior for all the distributions. You can run Linux from the terminal by pressing “Ctrl + Alt +T ”.  And to explore its functionality press the application button given on the left side of your desktop. What is the difference between Linux and Unix? Unix is an operating system developed in 1970 at Bell Labs by Ken Thomson. Linux and Unix were similar in many ways. Linux is created to be indistinguishable from Unix.  The major differences between Linux and Unix were as follows: Linux is an open-source operating system and is freely available to everyone whereas Unix is also an operating system that can be used only by the copyrighters. Linux suits best for the home user, developer as well as a student whereas Unix suits best for work stations, mainframes as well as servers. Linux is freely distributed and downloaded whereas Unix Copyright vendors decide the different costs for their respective operating systems. Linux supports more file system than Unix Linux is just a kernel, whereas Unix is a complete system of packages. It has higher security that has 60-100 viruses to date whereas Unix has 85-120 viruses to date. Likewise, there are many differences between Linux and Unix. By reaching the end of this blog, I hope you people have gained enough information regarding Linux. When you interact with the operating system, you people can acquire practical knowledge on this operating system. And you can also get practical exposure to this platform from real-time working professionals at Linux Online Course. In the upcoming post of this blog, I'll be sharing the details on the installation and various commands of the Linux operating system. Meanwhile, have a look at our  Linux Interview Questions

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Hadoop Cluster Interview Questions

  Q.Explain About The Hadoop-core Configuration Files? Ans: Hadoop core is specified by two resources. It is configured by two well written xml files which are loaded from the classpath: Hadoop-default.xml- Read-only defaults for Hadoop, suitable for a single machine instance. Hadoop-site.xml- It specifies the site configuration for Hadoop distribution. The cluster specific information is also provided by the Hadoop administrator. Q.Explain In Brief The Three Modes In Which Hadoop Can Be Run? Ans : The three modes in which Hadoop can be run are: Standalone (local) mode- No Hadoop daemons running, everything runs on a single Java Virtual machine only. Pseudo-distributed mode- Daemons run on the local machine, thereby simulating a cluster on a smaller scale. Fully distributed mode- Runs on a cluster of machines. Q.Explain What Are The Features Of Standalone (local) Mode? Ans : In stand-alone or local mode there are no Hadoop daemons running,  and everything runs on a single Java process. Hence, we don't get the benefit of distributing the code across a cluster of machines. Since, it has no DFS, it utilizes the local file system. This mode is suitable only for running MapReduce programs by developers during various stages of development. Its the best environment for learning and good for debugging purposes. Q.What Are The Features Of Fully Distributed Mode? Ans:In Fully Distributed mode, the clusters range from a few nodes to 'n' number of nodes. It is used in production environments, where we have thousands of machines in the Hadoop cluster. The daemons of Hadoop run on these clusters. We have to configure separate masters and separate slaves in this distribution, the implementation of which is quite complex. In this configuration, Namenode and Datanode runs on different hosts and there are nodes on which task tracker runs. The root of the distribution is referred as HADOOP_HOME. Q.Explain What Are The Main Features Of Pseudo Mode? Ans : In Pseudo-distributed mode, each Hadoop daemon runs in a separate Java process, as such it simulates a cluster though on a small scale. This mode is used both for development and QA environments. Here, we need to do the configuration changes. Q.What Are The Hadoop Configuration Files At Present? Ans : There are 3 configuration files in Hadoop: conf/core-site.xml: fs.default.name hdfs: //localhost:9000 conf/hdfs-site.xml: dfs.replication 1 conf/mapred-site.xml: mapred.job.tracker local host: 9001 Q.Can You Name Some Companies That Are Using Hadoop? Ans : Numerous companies are using Hadoop, from large Software Companies, MNCs to small organizations. Yahoo is the top contributor with many open source Hadoop Softwares and frameworks. Social Media Companies like Facebook and Twitter have been using for a long time now for storing their mammoth data. Apart from that Netflix, IBM, Adobe and e-commerce websites like Amazon and eBay are also using multiple Hadoop technologies. Q.Which Is The Directory Where Hadoop Is Installed? Ans : Cloudera and Apache have the same directory structure. Hadoop is installed in cd /usr/lib/hadoop-0.20/. Q.What Are The Port Numbers Of Name Node, Job Tracker And Task Tracker? Ans : The port number for Namenode is ’70′, for job tracker is ’30′ and for task tracker is ’60′. Q.Tell Us What Is A Spill Factor With Respect To The Ram? Ans : Spill factor is the size after which your files move to the temp file. Hadoop-temp directory is used for this. Default value for io.sort.spill.percent is 0.80. A value less than 0.5 is not recommended. Q.Is Fs.mapr.working.for A Single Directory? Ans : Yes, fs.mapr.working.dir it is just one directory. Q.Which Are The Three Main Hdfs-site.xml Properties? Ans : The three main hdfs-site.xml properties are: name.dir which gives you the location on which metadata will be stored and where DFS is located – on disk or onto the remote. data.dir which gives you the location where the data is going to be stored. checkpoint.dir which is for secondary Namenode. Q.How To Come Out Of The Insert Mode? Ans : To come out of the insert mode, press ESC, Type: q (if you have not written anything) OR Type: wq (if you have written anything in the file) and then press ENTER. Q.Tell Us What Cloudera Is And Why It Is Used In Big Data? Ans : Cloudera is the leading Hadoop distribution vendor on the Big Data market, its termed as the next-generation data management software that is required for business critical data challenges that includes access, storage, management, business analytics, systems security, and search. Q.We Are Using Ubuntu Operating System With Cloudera, But From Where We Can Download Hadoop Or Does It Come By Default With Ubuntu? Ans : This is a default configuration of Hadoop that you have to download from Cloudera or from eureka’s Dropbox and the run it on your systems. You can also proceed with your own configuration but you need a Linux box, be it Ubuntu or Red hat. There are installations steps present at the Cloudera location or in Eureka’s Drop box. You can go either ways. Q.What Is The Main Function Of The ‘jps’ Command? Ans : The jps’ command checks whether the Datanode, Namenode, tasktracker, jobtracker, and other components are working or not in Hadoop. One thing to remember is that if you have started Hadoop services with sudo then you need to run JPS with sudo privileges else the status will be not shown. Q.How Can I Restart Namenode? Ans : Click on stop-all.sh and then click on start-all.sh OR Write sudo hdfs (press enter), su-hdfs (press enter), /etc/init.d/ha (press enter) and then /etc/init.d/hadoop-0.20-namenode start (press enter). Q.How Can We Check Whether Namenode Is Working Or Not? Ans : To check whether Namenode is working or not, use the command /etc/init.d/hadoop- 0.20-namenode status or as simple as jps’. Q.What Is "fsck" And What Is Its Use? Ans : "fsck" is File System Check. FSCK is used to check the health of a Hadoop Filesystem. It generates a summarized report of the overall health of the filesystem. Usage:  hadoop fsck / Q.At Times You Get A ‘connection Refused Java Exception’ When You Run The File System Check Command Hadoop Fsck /? Ans : The most possible reason is that the Namenode is not working on your VM. Q.What Is The Use Of The Command Mapred.job.tracker? Ans : The command mapred.job.tracker is used by the Job Tracker to list out which host and port that the MapReduce job tracker runs at. If it is "local", then jobs are run in-process as a single map and reduce task. Q.What Does /etc /init.d Do? Ans : /etc /init.d specifies where daemons (services) are placed or to see the status of these daemons. It is very LINUX specific, and nothing to do with Hadoop. Q.How Can We Look For The Namenode In The Browser? Ans : If you have to look for Namenode in the browser, you don’t have to give localhost: 8021, the port number to look for Namenode in the browser is 50070. Q.How To Change From Su To Cloudera? Ans : To change from SU to Cloudera just type exit. Q.Which Files Are Used By The Startup And Shutdown Commands? Ans : Slaves and Masters are used by the startup and the shutdown commands. Q.What Do Masters And Slaves Consist Of? Ans : Masters contain a list of hosts, one per line, that are to host secondary namenode servers. Slaves consist of a list of hosts, one per line, that host datanode and task tracker servers. Q.What Is The Function Of Hadoop-env.sh? Where Is It Present? Ans : This file contains some environment variable settings used by Hadoop; it provides the environment for Hadoop to run. The path of JAVA_HOME is set here for it to run properly. Hadoop-env.sh file is present in the conf/hadoop-env.sh location. You can also create your own custom configuration file conf/hadoop-user-env.sh, which will allow you to override the default Hadoop settings. Q.Can We Have Multiple Entries In The Master Files? Ans : Yes, we can have multiple entries in the Master files. Q.In Hadoop_pid_dir, What Does Pid Stands For? Ans : PID stands for ‘Process ID’. Q.What Does Hadoop-metrics? Properties File Do? Ans : Hadoop-metrics Properties is used for ‘Reporting‘purposes. It controls the reporting for hadoop. The default status is ‘not to report‘. Q.What Are The Network Requirements For Hadoop? Ans : The Hadoop core uses Shell (SSH) to launch the server processes on the slave nodes. It requires password-less SSH connection between the master and all the slaves and the Secondary machines. Q.Why Do We Need A Password-less Ssh In Fully Distributed Environment? Ans : We need a password-less SSH in a Fully-Distributed environment because when the cluster is LIVE and running in Fully Distributed environment, the communication is too frequent. The job tracker should be able to send a task to task tracker quickly. Q.What Will Happen If A Namenode Has No Data? Ans : If a Namenode has no data it cannot be considered as a Namenode. In practical terms, Namenode needs to have some data. Q.What Happens To Job Tracker When Namenode Is Down? Ans : Namenode is the main point which keeps all the metadata, keep tracks of failure of datanode with the help of heart beats. As such when a namenode is down, your cluster will be completely down, because Namenode is the single point of failure in a Hadoop Installation. Q.Explain What Do You Mean By Formatting Of The Dfs? Ans : Like we do in Windows, DFS is formatted for proper structuring of data. It is not usually recommended to do as it format the Namenode too in the process, which is not desired. Q.We Use Unix Variants For Hadoop. Can We Use Microsoft Windows For The Same? Ans : In practicality, Ubuntu and Red Hat Linux are the best Operating Systems for Hadoop. On the other hand, Windows can be used but it is not used frequently for installing Hadoop as there are many support problems related to it. The frequency of crashes and the subsequent restarts makes it unattractive. As such, Windows is not recommended as a preferred environment for Hadoop Installation, though users can give it a try for learning purposes in the initial stage. Q.Which One Decides The Input Split - Hdfs Client Or Namenode? Ans : The HDFS Client does not decide. It is already specified in one of the configurations through which input split is already configured. Q.Let’s Take A Scenario, Let’s Say We Have Already Cloudera In A Cluster, Now If We Want To Form A Cluster On Ubuntu Can We Do It. Explain In Brief? Ans : Yes, we can definitely do it. We have all the useful installation steps for creating a new cluster. The only thing that needs to be done is to uninstall the present cluster and install the new cluster in the targeted environment. Q.Can You Tell Me If We Can Create A Hadoop Cluster From Scratch? Ans : Yes, we can definitely do that.  Once we become familiar with the Apache Hadoop environment, we can create a cluster from scratch. Q.Explain The Significance Of Ssh? What Is The Port On Which Port Does Ssh Work? Why Do We Need Password In Ssh Local Host? Ans : SSH is a secure shell communication, is a secure protocol and the most common way of administering remote servers safely, relatively very simple and inexpensive to implement. A single SSH connection can host multiple channels and hence can transfer data in both directions. SSH works on Port No. 22, and it is the default port number. However, it can be configured to point to a new port number, but its not recommended. In local host, password is required in SSH for security and in a situation where password less communication is not set. Q.What Is Ssh? Explain In Detail About Ssh Communication Between Masters And The Slaves? Ans : Secure Socket Shell or SSH is a password-less secure communication that provides administrators with a secure way to access a remote computer and data packets are sent across the slave. This network protocol also has some format into which data is sent across. SSH communication is not only between masters and slaves but also between two hosts in a network.  SSH appeared in 1995 with the introduction of SSH - 1. Now SSH 2 is in use, with the vulnerabilities coming to the fore when Edward Snowden leaked information by decrypting some SSH traffic. Q.Can You Tell Is What Will Happen To A Namenode, When Job Tracker Is Not Up And Running? Ans : When the job tracker is down, it will not be in functional mode, all running jobs will be halted because it is a single point of failure. Your whole cluster will be down but still Namenode will be present. As such the cluster will still be accessible if Namenode is working, even if the job tracker is not up and running. But you cannot run your Hadoop job.  

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Go Language interview Questions

Q.What Is Go? Ans: Go is a general-purpose language designed with systems programming in mind.It was initially developed at Google in year 2007 by Robert Griesemer, Rob Pike, and Ken Thompson. It is strongly and statically typed, provides inbuilt support for garbage collection and supports concurrent programming. Programs are constructed using packages, for efficient management of dependencies. Go programming implementations use a traditional compile and link model to generate executable binaries. Q.What Are The Benefits Of Using Go Programming? Ans: Support for environment adopting patterns similar to dynamic languages. For example type inference (x := 0 is valid declaration of a variable x of type int). Compilation time is fast. InBuilt concurrency support: light-weight processes (via goroutines), channels, select statement. Conciseness, Simplicity, and Safety. Support for Interfaces and Type embdding. Production of statically linked native binaries without external dependencies. Q.Does Go Support Type Inheritance? Ans: No support for type inheritance. Q.Does Go Support Operator Overloading? Ans: No support for operator overloading. Q.Does Go Support Method Overloading? Ans: No support for method overloading. Q.Does Go Support Pointer Arithmetics? Ans: No support for pointer arithmetic. Q.Does Go Support Generic Programming? Ans: No support for generic programming. Q.Is Go A Case Sensitive Language? Ans: Yes! Go is a case sensitive programming language. Q.What Is Static Type Declaration Of A Variable In Go? Ans: Static type variable declaration provides assurance to the compiler that there is one variable existing with the given type and name so that compiler proceed for further compilation without needing complete detail about the variable. A variable declaration has its meaning at the time of compilation only, compiler needs actual variable declaration at the time of linking of the program. Q.What Is Dynamic Type Declaration Of A Variable In Go? Ans: A dynamic type variable declaration requires compiler to interpret the type of variable based on value passed to it. Compiler don't need a variable to have type statically as a necessary requirement. Q.Can You Declared Multiple Types Of Variables In Single Declaration In Go? Ans: Yes Variables of different types can be declared in one go using type inference. var a, b, c = 3, 4, "foo" Q.How To Print Type Of A Variable In Go? Ans: Following code prints the type of a variable − var a, b, c = 3, 4, "foo" fmt.Printf("a is of type %Tn", a) Q.What Is A Pointer? Ans: It's a pointer variable which can hold the address of a variable. For example − var x = 5 var p *int p = &x fmt.Printf("x = %d", *p) Here x can be accessed by *p. Q.What Is The Purpose Of Break Statement? Ans: Break terminates the for loop or switch statement and transfers execution to the statement immediately following the for loop or switch. Q.What Is The Purpose Of Continue Statement? Ans: Continue causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating. Q.What Is The Purpose Of Goto Statement? Ans: goto transfers control to the labeled statement. Q.Explain The Syntax For 'for' Loop? Ans: The syntax of a for loop in Go programming language is − for { statement(s); } Here is the flow of control in a for loop − if condition is available, then for loop executes as long as condition is true. if for clause that is ( init; condition; increment ) is present then The init step is executed first, and only once. This step allows you to declare and initialize any loop control variables. You are not required to put a statement here, as long as a semicolon appears. Next, the condition is evaluated. If it is true, the body of the loop is executed. If it is false, the body of the loop does not execute and flow of control jumps to the next statement just after the for loop. After the body of the for loop executes, the flow of control jumps back up to the increment statement. This statement allows you to update any loop control variables. This statement can be left blank, as long as a semicolon appears after the condition. The condition is now evaluated again. If it is true, the loop executes and the process repeats itself (body of loop, then increment step, and then again condition). After the condition becomes false, the for loop terminates. if range is available, then for loop executes for each item in the range. Q.Explain The Syntax To Create A Function In Go? Ans: The general form of a function definition in Go programming language is as follows − func function_name( ) { body of the function } A function definition in Go programming language consists of a function header and a function body. Here are all the parts of a function − func func starts the declaration of a function. Function Name − This is the actual name of the function. The function name and the parameter list together constitute the function signature. Parameters − A parameter is like a placeholder. When a function is invoked, you pass a value to the parameter. This value is referred to as actual parameter or argument. The parameter list refers to the type, order, and number of the parameters of a function. Parameters are optional; that is, a function may contain no parameters. Return Type − A function may return a list of values. The return_types is the list of data types of the values the function returns. Some functions perform the desired operations without returning a value. In this case, the return_type is the not required. Function Body − The function body contains a collection of statements that define what the function does. Q.Can You Return Multiple Values From A Function? Ans: A Go function can return multiple values. For example − package main import "fmt" func swap(x, y string) (string, string) { return y, x } func main() { a, b := swap("Mahesh", "Kumar") fmt.Println(a, b) } Q.In How Many Ways You Can Pass Parameters To A Method? Ans: While calling a function, there are two ways that arguments can be passed to a function: Call by value: This method copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no effect on the argument. Call by reference:This method copies the address of an argument into the formal parameter. Inside the function, the address is used to access the actual argument used in the call. This means that changes made to the parameter affect the argument. Q.What Is The Default Way Of Passing Parameters To A Function? Ans: By default, Go uses call by value to pass arguments. In general, this means that code within a function cannot alter the arguments used to call the function while calling max() function used the same method. Q.What Do You Mean By Function As Value In Go? Ans: Go programming language provides flexibility to create functions on the fly and use them as values. We can set a variable with a function definition and use it as parameter to a function. Q.What Are The Function Closures? Ans: Functions closure are anonymous functions and can be used in dynamic programming. Q.What Are Methods In Go? Ans: Go programming language supports special types of functions called methods. In method declaration syntax, a "receiver" is present to represent the container of the function. This receiver can be used to call function using "." operator. Q.What Is Default Value Of A Local Variable In Go? Ans: A local variable has default value as it corresponding 0 value. Q.What Is Default Value Of A Global Variable In Go? Ans: A global variable has default value as it corresponding 0 value. Q.What Is Default Value Of A Pointer Variable In Go? Ans: Pointer is initialized to nil. Q.Explain The Purpose Of The Function Printf()? Ans: Prints the formatted output. Q.What Is Lvalue And Rvalue? Ans: The expression appearing on right side of the assignment operator is called as rvalue. Rvalue is assigned to lvalue, which appears on left side of the assignment operator. The lvalue should designate to a variable not a constant. Q.What Is The Difference Between Actual And Formal Parameters? Ans: The parameters sent to the function at calling end are called as actual parameters while at the receiving of the function definition called as formal parameters. Q.What Is The Difference Between Variable Declaration And Variable Definition? Ans: Declaration associates type to the variable whereas definition gives the value to the variable. Q.Explain Modular Programming? Ans: Dividing the program in to sub programs (modules/function) to achieve the given task is modular approach. More generic functions definition gives the ability to re-use the functions, such as built-in library functions. Q.What Is A Token? Ans: A Go program consists of various tokens and a token is either a keyword, an identifier, a constant, a string literal, or a symbol. Q.Which Key Word Is Used To Perform Unconditional Branching? Ans: goto Q.What Is An Array? Ans: Array is collection of similar data items under a common name. Q.What Is A Nil Pointers In Go? Ans: Go compiler assign a Nil value to a pointer variable in case you do not have exact address to be assigned. This is done at the time of variable declaration. A pointer that is assigned nil is called a nil pointer. The nil pointer is a constant with a value of zero defined in several standard libraries. Q.What Is A Pointer On Pointer? Ans: It's a pointer variable which can hold the address of another pointer variable. It de-refers twice to point to the data held by the designated pointer variable. var a int var ptr *int var pptr **int a = 3000 ptr = &a pptr = &ptr fmt.Printf("Value available at **pptr = %dn", **pptr) Therefore 'a' can be accessed by **pptr. Q.What Is Structure In Go? Ans: Structure is another user defined data type available in Go programming, which allows you to combine data items of different kinds. Q.How To Define A Structure In Go? Ans: To define a structure, you must use type and struct statements. The struct statement defines a new data type, with more than one member for your program. type statement binds a name with the type which is struct in our case. The format of the struct statement is this − type struct_variable_type struct { member definition; member definition; ... member definition; } Q.What Is Slice In Go? Ans: Go Slice is an abstraction over Go Array. As Go Array allows you to define type of variables that can hold several data items of the same kind but it do not provide any inbuilt method to increase size of it dynamically or get a sub-array of its own. Slices covers this limitation. It provides many utility functions required on Array and is widely used in Go programming. Q.How To Define A Slice In Go? Ans: To define a slice, you can declare it as an array without specifying size or use make function to create the one. var numbers int /* a slice of unspecified size */ /* numbers == int{0,0,0,0,0}*/ numbers = make(int,5,5) /* a slice of length 5 and capacity 5*/ Q.How To Get The Count Of Elements Present In A Slice? Ans: len() function returns the elements presents in the slice. Q.What Is The Difference Between Len() And Cap() Functions Of Slice In Go? Ans: len() function returns the elements presents in the slice where cap() function returns the capacity of slice as how many elements it can be accomodate. Q.How To Get A Sub-slice Of A Slice? Ans: Slice allows lower-bound and upper bound to be specified to get the subslice of it using. Q.What Is Range In Go? Ans: The range keyword is used in for loop to iterate over items of an array, slice, channel or map. With array and slices, it returns the index of the item as integer. With maps, it returns the key of the next key-value pair. Q.What Are Maps In Go? Ans: Go provides another important data type map which maps unique keys to values. A key is an object that you use to retrieve a value at a later date. Given a key and a value, you can strore the value in a Map object. After value is stored, you can retrieve it by using its key. Q.How To Create A Map In Go? Ans: You must use make function to create a map. /* declare a variable, by default map will be nil*/ var map_variable mapvalue_data_type /* define the map as nil map can not be assigned any value*/ map_variable = make(mapvalue_data_type) Q.How To Delete An Entry From A Map In Go? Ans: delete() function is used to delete an entry from the map. It requires map and corresponding key which is to be deleted. Q.What Is Type Casting In Go? Ans: Type casting is a way to convert a variable from one data type to another data type. For example, if you want to store a long value into a simple integer then you can type cast long to int. You can convert values from one type to another using the cast operator as following: type_name(expression) Q.What Are Interfaces In Go? Ans: Go programming provides another data type called interfaces which represents a set of method signatures. struct data type implements these interfaces to have method definitions for the method signature of the interfaces. Contact for more on Go Language Online Training  

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CCSA Interview Questions

 Q.Where You Can View The Results Of The Checkpoint? Ans: You can view the results of the checkpoints in the Test Result Window. Note: If you want to retrieve the return value of a checkpoint (a boolean value that indicates whether the checkpoint passed or failed) you must add parentheses around the checkpoint argument in the statement in the Expert View. Q.What’s The Standard Checkpoint? Ans: Standard Checkpoints checks the property value of an object in your application or web page. Q.Which Environment Are Supported By Standard Checkpoint? Ans: Standard Checkpoint are supported for all add-in environments. Q.Explain How A Biometric Device Performs In Measuring Metrics, When Attempting To Authenticate Subjects? Ans: False Rejection Rate Crossover Error Rate False Acceptance Rate Q.What’s The Image Checkpoint? Ans: Image Checkpoint check the value of an image in your application or web page. Q.Which Environments Are Supported By Image Checkpoint? Ans: Image Checkpoint are supported only Web environment. Q.What’s The Bitmap Checkpoint? Ans: Bitmap Checkpoint checks the bitmap images in your web page or application. Q.Which Environment Are Supported By Bitmap Checkpoints? Ans: Bitmap checkpoints are supported all add-in environment. Q.What’s The Table Checkpoints? Ans: Table Checkpoint checks the information with in a table. Q.Which Environments Are Supported By Table Checkpoint? Ans: Table Checkpoints are supported only ActiveX environment. Q.What’s The Text Checkpoint? Ans: Text Checkpoint checks that a test string is displayed in the appropriate place in your application or on web page. Q.Which Environment Are Supported By Test Checkpoint? Ans: Text Checkpoint are supported all add-in environments. Q.What Is Stealth Rule In Checkpoint Firewall? Ans: Stealth Rule Protect Checkpoint firewall from direct access any traffic. Its rule should be place on the top of Security rule base. In this rule administrator denied all traffic to access checkpoint firewall. Q.What Is Cleanup Rule In Checkpoint Firewall? Ans: Cleanup rule place at last of the security rule base, Its used to drop all traffic which not match with above rule and Logged. Cleanup rule mainly created for log purpose. In this rule administrator denied all the traffic and enable log. Q.What Is Explicit Rule In Checkpoint Firewall? Ans: Its a rule in ruse base which is manually created by network security administrator that called Explicit rule. Q.What Is 3 Tier Architecture Component Of Checkpoint Firewall? Ans: Smart Console. Security Management. Security Gateway. Q.What Is The Packet Flow Of Checkpoint Firewall? Ans: SAM Database. Address Spoofing. Session Lookup. Policy Lookup. Destination NAT. Route Lookup. Source NAT. Layer 7 Inspection. Q.Explain Which Type Of Business Continuity Plan (bcp) Test Involves Shutting Down A Primary Site, Bringing An Alternate Site On-line, And Moving All Operations To The Alternate Site? Ans: Full interruption. Q.Explain Which Encryption Algorithm Has The Highest Bit Strength? Ans: AES Q.Give An Example For Simple, Physical-access Control? Ans: Lock. Q.Which Of The Following Is Not An Auditing Function That Should Be Performed Regularly? Ans: Reviewing performance logs. Q.Explain How Do Virtual Corporations Maintain Confidentiality? Ans: Encryption. Q.Explain What Type Of Document Contains Information On Alternative Business Locations, It Resources, And Personnel? Ans: Business continuity plan. Q.Explain Which Of The Following Is The Best Method For Managing Users In An Enterprise? Ans: Place them in a centralized Lightweight Directory Access Protocol. Q.What Are Enterprise Business Continuity Plan (bcp)? Ans: Accidental or intentional data deletion Severe weather disasters Minor power outages Q.Explain Which Type Of Business Continuity Plan (bcp) Test Involves Practicing Aspects Of The Bcp, Without Actually Interrupting Operations Or Bringing An Alternate Site On-line? Ans: Simulation. contact for more on Checkpoint firewall online training  

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Chef (Software) Interview Questions

 Q.What Is A Resource? Ans: A resource represents a piece of infrastructure and its desired state, such as a package that should be installed, a service that should be running, or a file that should be generated. Q.What Is A Recipe? Ans: A recipe is a collection of resources that describes a particular configuration or policy. A recipe describes everything that is required to configure part of a system. Recipes do things such as: Install and configure software components. Manage files. Deploy applications. Execute other recipes. Q.What Happens When You Don’t Specify A Resource’s Action? Ans: When you don’t specify a resource’s action, Chef applies the default action. Q.Write A Service Resource That Stops And Then Disables The Httpd Service From Starting When The System Boots? Ans: Service ‘httpd’ do Action End Q.How Does A Cookbook Differ From A Recipe? Ans: A recipe is a collection of resources, and typically configures a software package or some piece of infrastructure. A cookbook groups together recipes and other information in a way that is more manageable than having just recipes alone. For example, in this lesson you used a template resource to manage your HTML home page from an external file. The recipe stated the configuration policy for your web site, and the template file contained the data. You used a cookbook to package both parts up into a single unit that you can later deploy. Q.How Does Chef-apply Differ From Chef-client? Ans: Chef-apply apply a single recipe; chef-client applies a cookbook. For learning purposes, we had you start off with chef-apply because it helps you understand the basics quickly. In practice, chef-apply is useful when you want to quickly test something out. But for production purposes, you typically run chef-client to apply one or more cookbooks. Q.What’s The Run-list? Ans: The run-list lets you specify which recipes to run, and the order in which to run them. The run-list is important for when you have multiple cookbooks, and the order in which they run matters. Q.What Are The Two Ways To Set Up A Chef Server? Ans: Install an instance on your own infrastructure. Use hosted Chef. Q.What’s The Role Of The Starter Kit? Ans: The Starter Kit provides certificates and other files that enable you to securely communicate with the Chef server. Q.What Is A Node? Ans: A node represents a server and is typically a virtual machine, container instance, or physical server – basically any compute resource in your infrastructure that’s managed by Chef. Q.What Information Do You Need To In Order To Bootstrap? Ans: You need: Your node’s host name or public IP address. A user name and password you can log on to your node with. Alternatively, you can use key-based authentication instead of providing a user name and password. Q.What Happens During The Bootstrap Process? Ans: During the bootstrap process, the node downloads and installs chef-client, registers itself with the Chef server, and does an initial check in. During this check in, the node applies any cookbooks that are part of its run-list. Q.Which Of The Following Lets You Verify That Your Node Has Successfully Bootstrapped? Ans: The Chef management console. Knife node list Knife node show You can use all three of these methods. Q.What Is The Command You Use To Upload A Cookbook To The Chef Server? Ans: Knife cookbook upload. Q.How Do You Apply An Updated Cookbook To Your Node? Ans: We mentioned two ways. Run knife Ssh from your workstation. SSH directly into your server and run chef-client. You can also run chef-client as a daemon, or service, to check in with the Chef server on a regular interval, say every 15 or 30 minutes. Update your Apache cookbook to display your node’s host name, platform, total installed memory, and number of CPUs in addition to its FQDN on the home page. Update index.html.erb like this. hello from < /h1> – RAM CPUs Then upload your cookbook and run it on your node. Q. What Would You Set Your Cookbook’s Version To Once It’s Ready To Use In Production? Ans: According to Semantic Versioning, you should set your cookbook’s version number to 1.0.0 at the point it’s ready to use in production. Q. Create A Second Node And Apply The Awesome Customers Cookbook To It. How Long Does It Take? Ans: You already accomplished the majority of the tasks that you need. You wrote the awesome customers cookbook, uploaded it and its dependent cookbooks to the Chef server, applied the awesome customers cookbook to your node, and verified that everything’s working. All you need to do now is: Bring up a second Red Hat Enterprise Linux or Centos node. Copy your secret key file to your second node. Bootstrap your node the same way as before. Because you include the awesome customers cookbook in your run-list, your node will apply that cookbook during the bootstrap process. The result is a second node that’s configured identically to the first one. The process should take far less time because you already did most of the work. Now when you fix an issue or add a new feature, you’ll be able to deploy and verify your update much more quickly! Q. What’s The Value Of Local Development Using Test Kitchen? Ans: Local development with Test Kitchen: Enables you to use a variety of virtualization providers that create virtual machine or container instances locally on your workstation or in the cloud. Enables you to run your cookbooks on servers that resemble those that you use in production. Speeds up the development cycle by automatically provisioning and tearing down temporary instances, resolving cookbook dependencies, and applying your cookbooks to your instances.  

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React JS Interview Questions

What Is Reactjs? Ans: React is an open source JavaScript front end UI library developed by Facebook  for creating interactive, stateful & reusable UI components for web and mobile app. It is used by Facebook, Instagram and many more web apps. ReactJS is used for handling view layer for web and mobile applications. One of React’s unique major points is that  it perform not only on the client side, but also can be rendered on server side, and they can work together inter-operably. Why Reactjs Is Used? Ans: React is used to handle the view part of Mobile application and Web application. Does Reactjs Use Html? Ans: No, It uses JSX which is simiar to HTM. When Reactjs Released? Ans: March 2013 What Is Current Stable Version Of Reactjs? Ans: Version: 15.5 Release on: April 7, 2017 What Are The Life Cycle Of Reactjs? Ans: Initialization State/Property Updates Destruction What Are The Feature Of Reactjs? Ans: JSX: JSX is JavaScript syntax extension. Components : React is all about components. One direction flow: React implements one way data flow which makes it easy to reason about your app What Are The Advantages Of Reactjs? Ans: React uses virtual DOM which is JavaScript object. This will improve apps performance It can be used on client and server side Component and Data patterns improve readability. Can be used with other framework also. How To Embed Two Components In One Component? Ans: import React from 'react'; class App extends React.Component { render() { return ( ); } } class Header extends React.Component { render() { return ( Header ); What Are The Advantages Of Using Reactjs? Ans: Advantages of ReactJS: React uses virtual DOM which is JavaScript object. This improves application performance as JavaScript virtual DOM is faster than the regular DOM. React can be used on client and as well as server side too. Using React increases readability and makes maintainability easier. Component, Data patterns improves readability and thus makes it easier for manitaing larger apps. React can be used with any other framework (Backbone.js, Angular.js) as it is only a view layer. React’s JSX makes it easier to read the code of our component. It’s really very easy to see the layout. How components are interacting, plugged and combined with each other in app. What Are The Limitations Of Reactjs? Ans: Limitations of ReactJS: React is only for view layer of the app so we still need the help of other technologies to get a complete tooling set for development. React is using inline templating and JSX. This can seem awkward to some developers. The library of react  is too  large. Learning curve  for ReactJS may be steep. How To Use Forms In Reactjs? Ans: In React’s virtual DOM, HTML Input element presents an interesting problem. With the others DOM environment, we can  render the input or textarea and thus allows the browser maintain its   state that is (its value). we can then get and set the value implicitly with the DOM API. In HTML, form elements such as , , and itself  maintain their own state and update its state  based on the input provided by user .In React, components’ mutable state is handled by the state property  and is only updated by setState(). HTML and components use the value attribute. HTML checkbox and radio components, checked attribute is used. (within ) components, selected attribute is used for select box. How To Use Events In Reactjs? Ans: React identifies every events so that it must  have common and consistent behavior  across all the browsers. Normally, in normal JavaScript or other frameworks, the onchange event is triggered after we have typed something into a Textfield and then “exited out of it”. In  ReactJS we cannot do it in this way. The explanation is typical and  non-trivial: *” renders an input textbox initialized with the value, “dataValue”. When the user changes the input in text field, the node’s value property will update and change. However, node.getAttribute(‘value’) will still return the value used at initialization time that is dataValue. Form Events: onChange: onChange event  watches input changes and update state accordingly. onInput: It is triggered on input data onSubmit: It is triggered on submit button. Mouse Events: onClick: OnClick of any components event is triggered on. onDoubleClick: onDoubleClick of any components event is triggered on. onMouseMove: onMouseMove of any components, panel event is triggered on. onMouseOver: onMouseOver of any components, panel, divs event is triggered on. Touch Events: onTouchCancel: This event is for canceling an events. onTouchEnd: Time Duration attached to touch of a screen. onTouchMove: Move during touch device . onTouchStart: On touching a device event is generated. Give An Example Of Using Events? Ans: import React from 'react'; import ReactDOM from 'react-dom'; var StepCounter = React.createClass({ getInitialState: function() { return {counter: this.props.initialCounter }; }, handleClick: function() { this.setState({counter: this.state.counter + 1});  }, render: function() { return OnClick Event, Click Here: {this.state.counter }; } }); ReactDOM.render(< StepCounter initialCounter={7}/>, document.getElementById('content')); Explain Various Flux Elements Including Action, Dispatcher, Store And View? Ans: Flux can be better explained by defining its individual components: Actions– They are helper methods that facilitate passing data to the Dispatcher. Dispatcher– It is Central hub of app, it receives actions and broadcasts payloads to registered callbacks. Stores– It is said to be Containers for application state & logic that have callbacks registered to the dispatcher. Every store maintains particular state and it will update  when it is needed. It wakes up on a relevant dispatch to retrieve the requested data. It is accomplished by registering with the dispatcher  when constructed. They are  similar to  model in a traditional MVC (Model View Controller), but they manage the state of many objects —  it does not represent a single record of data like ORM models do. Controller Views– React Components  grabs the state from Stores and pass it down through props to child components to view to render application. What Is Flux Concept In Reactjs? Ans: Flux is the architecture of an application that Facebook uses for developing client-side web applications. Facebook uses internally when working with React. It is not a framework or a library. This is simply a new technique that complements React and the concept of Unidirectional Data Flow. Facebook dispatcher library is a sort of global pub/sub handler technique which broadcasts payloads to registered callbacks. Give An Example Of Both Stateless And Stateful Components With Source Code? Ans: Stateless and Stateful components Stateless: When a component is “stateless”, it calculates state is calculated internally but it directly  never mutates it. With the same inputs, it will always produce the same output. It means it has no knowledge of the past, current or future state changes. var React = require('react'); var Header = React.createClass({ render: function() { return(   ); } }); ReactDOM.render(, document.body); Stateful : When a component is “stateful”, it is a central point that stores every information in memory about the app/component’s state, do has the ability to change it. It has knowledge of past, current and potential future state changes. Stateful component  change the state, using this.setState method. var React = require('react'); var Header = React.createClass({ getInitialState: function() { return { imageSource: "header.png" }; }, changeImage: function() { this.setState({imageSource: "changeheader.png"}); }, render: function() { return( ); } }); module.exports = Header; Explain Basic Code Snippet Of Jsx With The Help Of A Practical Example? Ans: Your browsers does not understand JSX code natively, we need to convert it to JavaScript first which can be understand by our browsers. We have aplugin which handles including Babel 5’s in-browser ES6 and JSX transformer called browser.js. Babel will understand and recognize JSX code in tags and transform/convert it to normal JavaScript code. In case of production we will need to pre-compile our JSX code into JS before deploying to production environment so that our app renders faster. My First React JSX Example var HelloWorld = React.createClass({ render: function() { return ( Hello, World ) } }); ReactDOM.render( , document.getElementById('hello-world')); What Are The Advantages Of Using Jsx? Ans: JSX is completely optional and its not mandatory, we don’t need to use it in order to use React, but it has several advantages  and a lot of nice features in JSX. JSX is always faster as it performs optimization while compiling code to vanilla JavaScript. JSX is also type-safe, means it is strictly typed  and most of the errors can be caught during compilation of the JSX code to JavaScript. JSX always makes it easier and faster to write templates if we are familiar with HTML syntax. What Is Reactjs-jsx? Ans: JSX (JavaScript XML), lets us to build DOM nodes with HTML-like syntax. JSX is a preprocessor step which adds XML syntax to JavaScript. Like XML, JSX tags have a tag name, attributes, and children JSX also has the same. If an attribute/property value is enclosed in quotes(“”), the value is said to be string. Otherwise, wrap the value in braces and the value is the enclosed JavaScript expression. We can represent JSX as . What Are Components In Reactjs? Ans: React encourages the idea of reusable components. They are widgets or other parts of a layout (a form, a button, or anything that can be marked up using HTML) that you can reuse multiple times in your web application. ReactJS enables us to create components by invoking the React.createClass() method  features a render() method which is responsible for displaying the HTML code. When designing interfaces, we have to break down the individual design elements (buttons, form fields, layout components, etc.) into reusable components with well-defined interfaces. That way, the next time we need to build some UI, we can write much less code. This means faster development time, fewer bugs, and fewer bytes down the wire. How To Apply Validation On Props In Reactjs? Ans: When the application is running in development mode, React will automatically check  for all props that we set on components to make sure they must right correct and right data type. For instance, if we say a component has a Message prop which is a string and is required, React will automatically check and warn  if it gets invalid string or number or boolean objects. For performance reasons this check is only done on dev environments  and on production it is disabled so that rendering of objects is done in fast manner . Warning messages are generated   easily  using a set of predefined options such as: PropTypes.string PropTypes.number PropTypes.func PropTypes.node PropTypes.bool What Are State And Props In Reactjs? Ans: State is the place where the data comes from. We must follow approach  to make our state as simple as possible and minimize number of stateful components. For example, ten components that need data from the state, we should create one container component that will keep the state for all of them. The state starts with a default value and when a Component mounts and then suffers from mutations in time (basically generated from user events). A Component manages its own state internally, but—besides setting an initial state—has no business fiddling with the stateof its children. You could say the state is private. import React from 'react'; import ReactDOM from 'react-dom'; var StepCounter = React.createClass({ getInitialState: function() { return {counter: this.props.initialCount}; }, handleClick: function() { this.setState({counter: this.state. counter + 1}); }, render: function() { return {this.state.counter }; } }); ReactDOM.render(< StepCounter initialCount={7}/>, document.getElementById('content')); Props: They are immutable, this is why container component should define state that can be updated and changed. It is used to pass data down from our view-controller(our top level component). When we need immutable data in our component we can just add props to reactDOM.render() function. import React from 'react'; import ReactDOM from 'react-dom'; class PropsApp extends React.Component { render() { return ( {this.props.headerProperty} {this.props.contentProperty} ); } } ReactDOM.render(, document.getElementById('app')); } What Is The Difference Between The State And Props In Reactjs? Ans: Props: Passes in from parent component.This properties are being read by  PropsApp component and sent to ReactDOM View. State: Created inside component by getInitialState.this.state reads the property of component and update its value it by this.setState() method and then returns to ReactDOM view.State is private within the component. What Are The Benefits Of Redux? Ans: Maintainability: Maintenance of Redux becomes easier due to strict code structure and organisation. Organization: Code organisation is very strict hence the stability of the code is high which intern increases the work to be much easier. Server rendering: This is useful, particularly to the preliminary render, which keeps up a better user experience or search engine optimization. The server-side created stores are forwarded to the client side. Developer tools: It is Highly traceable so changes in position and changes in the application all such instances make the developers have a real-time experience. Ease of testing: The first rule of writing testable code is to write small functions that do only one thing and that are independent. Redux’s code is made of functions that used to be: small, pure and isolated. How Distinct From Mvc And Flux? Ans: As far as MVC structure is concerned the data, presentation and logical layers are well separated and handled. here change to an application even at a smaller position may involve a lot of changes through the application. this happens because data flow exists bidirectional as far as MVC is concerned. Maintenance of MVC structures are hardly complex and Debugging also expects a lot of experience for it. Flux stands closely related to redux. A story based strategy allows capturing the changes applied to the application state, the event subscription, and the current state are connected by means of components. Call back payloads are broadcasted by means of Redux. What Are Functional Programming Concepts? Ans: The various functional programming concepts used to structure Redux are listed below: Functions are treated as First class objects. Capable to pass functions in the format of arguments. Capable to control flow using, recursions, functions and arrays. helper functions such as reduce and map filter are used. allows linking functions together. The state doesn’t change. Prioritize the order of executing the code is not really necessary. What Is Redux Change Of State? Ans: For a release of an action, a change in state to an application is applied, this ensures an intent to change the state will be achieved. Example: The user clicks a button in the application. A function is called in the form of component So now an action gets dispatched by the relative container. This happens because the prop (which was just called in the container) is tied to an action dispatcher using mapDispatchToProps (in the container). Reducer on capturing the action it intern executes a function and this function returns a new state with specific changes. The state change is known by the container and modifies a specific prop in the component as a result of the mapStateToProps function. Where Can Redux Be Used? Ans: Redux is majorly used is a combination with reacting. it also has the ability to get used with other view libraries too. some of the famous entities like AngularJS, Vue.js, and Meteor. can get combined with Redux easily. This is a key reason for the popularity of Redux in its ecosystem. So many articles, tutorials, middleware, tools, and boilerplates are available. What Is The Typical Flow Of Data In A React + Redux App? Ans: Call-back from UI component dispatches an action with a payload, these dispatched actions are intercepted and received by the reducers. this interception will generate a new application state. from here the actions will be propagated down through a hierarchy of components from Redux store. The below diagram depicts the entity structure of a redux+react setup. What Is Store In Redux? Ans: The store holds the application state and supplies the helper methods for accessing the state are register listeners and dispatch actions. There is only one Store while using Redux. The store is configured via the create Store function. The single store represents the entire state.Reducers return a state via action export function configureStore(initialState) { return createStore(rootReducer, initialState); } The root reducer is a collection of all reducers in the application. const root Reducer = combineReducers({ donors: donor Reducer, }); Explain Reducers In Redux? Ans: The state of a store is updated by means of reducer functions. A stable collection of a reducers form a store and each of the stores maintains a separate state associated for itself. To update the array of donors, we should define donor application Reducer as follows. export default function donorReducer(state = , action) { switch (action.type) { case actionTypes.addDonor: return ; default: return state; } } The initial state and action are received by the reducers. Based on the action type, it returns a new state for the store. The state maintained by reducers are immutable. The below-given reducer it holds the current state and action as an argument for it and then returns the next state:function handelingAuthentication(st, actn) { return _.assign({}, st, { auth: actn.pyload }); } What Are Redux Workflow Features? Ans: Reset: Allow to reset the state of the store Revert: Roll back to the last committed state Sweep: All disabled actions that you might have fired by mistake will be removed Commit: It makes the current state the initial state Explain Action’s In Redux? Ans: Actions in Redux are functions which return an action object. The action type and the action data are packed in the action object. which also allows a donor to be added to the system. Actions send data between the store and application. All information’s retrieved by the store are produced by the actions. export function addDonorAction(donor) { return { type: actionTypes.add Donor, donor, }; } Internal Actions are built on top of Javascript objects and associate a type property to it. Click here to add your own text

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