Tibco Interview Questions and Answers Q.How do you configure client for fault tolerant connection? Answer: . Specify multiple server as a comma-separated list of URLs and both URLs must use same protocol either tcp or ssl. Q.What are the different types of acknowledgement modes in EMS message delivery Answer:
- Auto • Client • Dups_ok • No_ack • Explciit • Explicit_client_dups_ok • Transitional • Local transitional.
Q.What are the different types of messages that can be used in EMS ? Answer: • Text • Simple • Bytes • Map • XML test • Object • Object ref • Stream Q.Tell me about bridges. Why do we use them, Syntax to create bridges, use of message selector ? Answer: Some applications require the same message to be sent to more than one destination possibly of different types. So we use bridges. Q.why do we need routers ? Answer: . To transfer messages between different ems servers. Q.What is the purpose for stores.conf ? Answer:
- This file defines the locations either store files or a database, where the EMS server will store messages or metadata. b. Each store configured is either a file-based or a database store.
Q.How many modes are the messages written to store file. Answer: 2 modes.. sync or async. When absent , the default is async Q.What is tibemsd.conf? Answer: It is the main configuration file that controls the characteristics of the EMS server Q.How many delivery modes for messages? Answer: Persistent, Non-persistent, Reliable-delivery. Q.What is the maximum messagesize? Answer: Ems supports max message size of 512 mb Q.Name 3 destination properties and explain them. Answer: Global, secure, maxmsgs, maxbytes, flowcontrol, sender_name, sender_name_enforced, trace,maxRedelivery Q.What are the different modes of installation in Ems? Answer: a. GUI mode b. Console mode c. Silent mode Q.What are the messaging models supported by JMS? Answer: a. Point-to-point b. Publish-subscribe c. Multicast Q.Tell me about routes Answer: What is the purpose of routes, what kind of destinations can be used in routes? Topics and queues m-hops Q.What happens if the message expires/exceeded the value specified by maxredelivery property on queue? Answer: If the jms_preserve_undelivered property is set to true, then it moves he message to undelivered message queue, if set to false, the message is deleted by the server. Q.In how many ways can a destination be created? Answer: a. Static-created by user b. Dynamic-created by ems server on the fly. c. Temporary destinations. Q.Tell me about flow control on destinations Answer: Some times the producer may send messages faster than the consumers can receive them. So, the message capacity on the server will be exhausted. So we use flow control. Flow control can be specified on destinations. Q.Tell me about flow control on bridges and routes Answer: Flow control has to be specified on both sides of bridges where as on routes it operates differently on sender side and receiver side. Q.Name 3 configuration files and tell me what it consists of Answer: a. Queues.conf b. Topics.conf c. Routes.conf d. Factories.conf e. Stores.conf f. Groups.conf,users.conf,transports.conf Q.Name some administrative level destination properties a. View b. Create c. Delete d. Modify e. Purge Q.How can you change the configuration properties of EMS server Answer: You can change in the tibemsd.conf file or you can change using the ems admin console. Q.What are the permissions that you can grant to users to access queues Answer: a. Receive b. Send c. Browse Q.What are the permissions that you can grant to users to access topics Answer: a. Subscribe b. Publish c. Durable d. Use_durable Q.Tell me about multicasting in EMS Answer: a. Multicast is a messaging model that broadcasts messages to many consumers at once rather than sending messages individually to each consumer. EMS uses Pragmatic general multicast to broadcast messages published to multicast enabled topics. b. Each multicast enabled topic is associated with a channel. Q.What is the default maximum size of message? Answer: . 512mb Q.What is the transition in BW? Answer: to move the data from one activity to another or when conditions exist on the data. Q.What are the different kinds of condition types you can have in transition? Explain Them Answer: a)Success :- Take this transition unconditionally. That is, always transition to the activity the transition points to, if the activity completes successfully. This is the default condition for transitions. b)Success with condition :- Specify a custom condition using XPath. If the activity completes successfully, and the condition you create evaluates to true, the transition is taken to the activity it points to. You can type in an XPath condition, and you can use the XPath formula builder to drag and drop XPath expressions and data into the condition. c)Success if no matching condition :- Take this transition when the activity completes successfully, but only if no other transition s are taken. This is useful when multiple transition s with conditions are drawn to other activities. This condition type can be used to handle any cases not handled by the conditions on the other transition s. d)Error :- Take this transition if there is an error during processing of the activity. Q.What is Generate Error activity? What the applications of it ? Answer:This activity generates an error and causes an immediate transition to any error transitions. If there are no error transitions, the process instance halts execution. This activity is useful in a group or in a called process. If you would like to catch and raise your own error conditions, you can use this activity to do so. Q.What are the shared variables and process variables? Answer: Process variables: Process variables are data structures available to the activities in the process. You can define your own process variables and assign values to them in your process definition. Process variables are defined on the Process Variables tab of the Process Definition resource. And assigning values to these kind of variables is done using the assign activity. Shared variables: A Shared Variable resource allows you to share data across process instances. All process instances can read and update the data stored in a shared variable. This type of shared variable is useful if you wish to pass data across process instances or if you wish to make a common set of information available to all process instances. Q.What is XPATH? Answer: isa XML based path language used to navigate the XML document and manipulate the data Q.What is XSD? Answer: XML schema definition. Q.What is name space in XSD? Answer: A name conflict will occur when two different documents use the same element names. So each element is given a unique namespace. Q.What is aweb-service? Answer: application or a network responding to some remote web-request. Q.What is a wsdl?what are different types of wsdl? Answer:Web-services run on wsdl,it defines structure of schema.There are two types of wsdl Abstract wsdl:-Used on server side,contains request,response and type of operation performed. concrete wsdl:-used on client side,contains abstract wsdl and tr port used. Q.In how any ways can we create EAR files ? Answer: We can build EAR files in 2 ways. One method is using the Enterprise Archive pallete in the Tibco designer and adding the process archive we can build EAR file. Other method is from the cmd prompt. We use the command appmanage and buildear. Q.What is Schema and why do we create schema ? Answer: Schema is used to create a XML schema file in which we add the variables which we want to use in our designer process. We can create the elements under which we can add the typed variables. The structure formed will be in the form of tree structure? Q.What is the use of confirm activity. Answer: Confirm activity is used to confirm the success of a activity that have confirmable messages. For example if certain process starts on reception of a message then if that process starts the confirm activity sends a confirm message to the sender of the message. Q.What are the different modes of tibco BW installation? Answer: There are 3 modes installation .
- a) GUI
- b) console
- c) silent
Q.When we save a project what files are created under the saved project folder? Answer: In that folder we see the Aeschema folder, all processes create in that project and the vcrepo.dat file. Q.What are the contents of vcrepo.dat? Answer: This files contains the display name , RV encodings and description. Q.What is grouping activity? Answer: Grouping activity is used to group certain activities used in the designer so that we can loop those activities and iterate the group with conditions. Q.What is the condition for a process in order to build the EAR file? Answer: We need to have a process starter. Q.How can we design exception handling? Answer: The basic method is by routing the process to another sub process whenever error occurs by using the error transition . Q.What is the use of Render XML pallet? Answer: It is used to create a XML file by creating the tags used in the xml file. Q.What are the elements in the WSDL file? Answer: In abstract WSDl file we have the information about the messages ( request, reply) port type, operation. In concrete in addition to above we have the trAnswer: port information. Q.What is the use of global variables? Answer: Global variables are useful in order to provide dynamic input at the run time. Q.What is custom activity? Answer: Custom activity is useful when we want others to use our process and not allow them to view the contents of the process. We can add this process into our MY Pallete section. We can directly use this process by dragging it into our process. Q.In web service in how many ways can we create connections? Answer: 2 ways. HTTP and JMS. Q.How does the file poller activity works ? Answer: This is a starter activity which starts the process whenever there is update for the file that is specified. Q.What is the use of project template? Answer: In project template we can save our standard processes that we want to use in future. These processes are generally the ones which have the commonly used activities. Q.What is the optimum maximum number of connections in JDBC? Answer: 10 Q.What is sub process and what is its use? Answer: Whenever we call a process from another process , the called processbecomes the subprocess. Sub process helps in reducing the complexity of the design by assigning the activity in other process. Q.What is TRA? Answer: Tibco Runtime Agent is the main frame work for all the tibco softwares. It provides the runtime agent and monitoring agent. All the libraries required by the designs are provided by TRA. Q.What are the process variables that are available to all activities as inputs? Answer: global variables and process context. Q.What are break points? Answer: Break points are used to check the inputs and outputs of each activity during testing the design so that we can debug our design. We can place the check points for all activities on input and output side. Q.What re the encoding techniques in WSDL? Answer: Encoded and literal. Q.What are the conditions in transition s? Answer: Success, Success with condition, Success with no condition and error. Q.What are the different variables in BW? Answer: Global variables, Shared variables, process variables and job shared variables. Q.Explain the processes flow of your latest project by including activities. Answer: for various service implementation I designed processes using various BW activities like JMS Queue Receiver, XML Parser Q.What are the differences between the versions 2.x and 5.2? Answer: Type 2.x 5.2 deployment In 2.x deployment is done in the designer Here deployment is done using administrator tool Name spaces Name spaces are prefixed with tib No tib in name spaces pallets Extra pallets added Iterate-reset At the end of each iterate the output is not reset Here the output is reset after each iteration installation Here all the components like BW,ADB,FILE etc come as a package Here we will have to install each component separately File type All files are .dat. we have to convert these manually Multi format file are available so that we do not have to convert the dat files Q.What are the activities you worked on? Answer: JMS queue receiver,confirm,checkpoint,XML parser,call process,JDBC update,SOAP,HTTP. write to log - widely used. Assign. Q.What is the inspector activity does? Answer: the inspector activity is used to obtain the output of any activity or all the activities and process variables. Scenario: You can use the inspector activity to write the output of any activity or process variable in the current process. Activities and process variables in a subprocess are not available to the Inspector activity (but the output of a Call Process activity can be written using the Inspector activity). If you wish to obtain the output from one or more activities or process variables in a subprocess, place the Inspector activity in the process definition of the subprocess. Q.Can you tell me at least four starter activities and when they get executed? Answer: 1) Adapter subscriber, adap request response server :-When ever a message comes into a destination queue or network, listerns to a request from a adapter and sends a respose back to that adapter 2) File poller :- polls for any changes that occur in the file and with any change grabs the whole file. 3) Timer:- receive notification Starts a process on the time specified ex: before JDBC QUERY, starts a process on receiving of data from a notify activity. 4) http receiver :-Starts a process based on a request from http server. 5) Jms queue receiver, jms topic subscriber :- Starts a process when ever a new message comes into the specified queue, starts a process when ever there is a new message in the specified topic. 6) Receive mail :- The Receive Mail process starter polls a POP3 mail server for new mail. When new mail is detected and retrieved, the Receive Mail process starter starts a new process for the process definition it resides in and passes the mail data to the next activity in the process flow. 7) Rv subscriber:- The Rendezvous Subscriber process starter creates a process when a TIBCO Rendezvous message on the given subject is received. Cool Rmi server :- The RMI Server process starter registers the specified remote object name with the specified registry server and then creates process instances to handle incoming requests for the object. The process definition acts as the implementation of the specified object. 9) Soap event source :- The SOAP Event Source process starter creates a process instance for incoming SOAP requests. SOAP is a standard protocol for invoking web services. This allows you to create a web service using process definitions. At runtime, a client can retrieve the WSDL file for a process containing this process starter using an HTTP request. Once the WSDL is retrieved, the client can perform a SOAP request to invoke the web service. 10)Tcp receiver The TCP Receiver process starter starts a new process when a client requests a TCP connection. Q.What is the purpose of JMS Queue receiver activity and Queue sender activity? Answer: Starts a process when ever a new message comes into the specified queue. A queue sender activity sends messages into the specified queue. Q.What are acknowledgement modes and where do you set them and what is the applicability of each mode? Answer: The acknowledge mode for incoming messages. Can be one of the following: • Auto — the message is automatically acknowledged when it is received. • Client — the message will be acknowledged at a later point by using the Confirm activity. If the message is not confirmed before the process instance ends, the message is redelivered and a new process instance is created to handle the new incoming message. Ensure that your process definition confirms the message when using this acknowledge mode. • TIBCO EMS Explicit Client Acknowledge — this mode behaves exactly the same as the Client mode, except the session is not blocked and one session can handle all incoming messages. • Dups OK — the message is acknowledged automatically when it is received. JMS provides this mode for lazy acknowledgement, but TIBCO BusinessWorks acknowledges messages upon receipt. • Transactional — this mode is used when a Transction that can process JMS messages is included in the process definition. The message is acknowledged when the Transction commits. See TIBCO BusinessWorks Process Design Guide for more information about creating transction JMS activities can participate in. Q.What is a check point activity and confirm activity? Answer: A checkpoint saves the current process data and state so that it can be recovered at a later time in the event of a failure. If a process engine fails, all process instances can be recovered and resume execution at the location of their last checkpoint in the process definition. The Confirm activity confirms any confirmable messages received by the process instance. For example, if a process is started because of the receipt of an RVCM message, the Confirm activity can send a confirmation message to the publisher of the RVCM message Q.What happens if you use check point activity first and confirm next? Answer: In the case of confirmable messages , you must consider the consequences of performing a checkpoint before or after a Confirm activity. If the checkpoint is taken before the Confirm activity, then a crash occurs after a checkpoint but before a confirm, the original message is resent. In this case, the restarted process can no longer send the confirmation. However, a new process is started to handle the resent message, and you can implement your process to handle the restarted and new processes appropriately. If the checkpoint is taken after a Confirm activity, there is potential for a crash to occur after the Confirm but before the checkpoint. In this case, the message is confirmed and therefore not redelivered. The process instance is not restarted, because the crash occurred before the checkpoint. You must consider the type of processing your process definition performs to determine when a checkpoint is appropriate if your process definition receives confirmable messages. Tibco Interview Questions Tibco Interview Questions and Answers Q.What is the potential problem with JMS Queue requestor? Answer: When we specify a reply to queue there is a chance of other processes sending messages to the same queue and the jms queue requestor interpreting that as the actual response and sending this wrong message to the client. Q.What are the modes of installation of tibco bw applns? a. GUI mode b. Console c. Silent mode Q.What is the thread count in tibco administrator? Answer:
- 8-32 threads for BW engines b. For http connections-10/75 c. JMS-it’s a single thread model
Q.What is Max jobs, Flow limit, and Activation limit? Answer: a. Max jobs: Max jobs specify the number of process instances that are kept in memory while executing. b. Flow Limit: it is the max number of jobs that can be spawned before the process starter is suspended. c. Activation Limit: Specifies that once a process instance is loaded and it must be placed in memory till it completes execution. Q.What are tibco best practices-users? Answer: a. User ”tibco” should be master of all applications. b. User “tibcou” should have read only access to tibco applications and have read write access to logs owned by developer groups. Q.In how many ways can you deploy EAR file? Answer: a. Using tibco administrator GUI b. Use Appmanage utility to deploy EAR file into targeted domains Q.Whether to use check point/confirm activity first? Answer: BW doc/general palette/checkpoint/confirm Q.What information can be found in the appmanage.batch file? Answer: Component paths, service instance paths that is required to run AppManage utility Q.What is difference between EMS and RV? Answer: Ems is centralized where as RV is bus based Q.What are the 2 message trAnswer: port types? Answer: Ems has 2 message trAnswer: port types
- Point-to-point: queues ii. Pub-sub : topics
Q.What is the diff between tibco adapter and BW component? Answer: a. Adapters are connectors that use a messaging channel that can be configured over source/target systems which can be used in Pub,Sub or Replyrequest mode. BW components are designer, administrator, bw engine. Q.Why are routes used? Answer: When we have to send messages from one server to another. Q.If you have installed a particular version of TIBCO software e.g. TIBCO BW X.Y.Z, What are X, Y and Z number stands for? Answer: Integration can be at different application layers: X:Patch Y:Major Z:Minor Q.What is the role of TRA? Answer: TRA stands for TIBCO Runtime Agent. The TRA has two main functions:
- Supplies an agent that is running in the background on each machine.
- The agent is responsible for starting and stopping processes that run on a machine according to the deployment information.
- The agent monitors the machine. That information is then visible via TIBCO Administrator.
- Supplies the run-time environment, that is, all shared libraries including third-party libraries.
Q.What are the resources that gets included in the EAR file, created by the TIBCO Designer? Answer: An EAR file can contain local project resources, LibraryBuilder resources, and files as specified in AliasLibrary resources. In addition, the TIBCO Designer classpath may include references to other files that are included in the EAR file. Q.What are the revision control system options available in TIBCO designer? Answer: File sharing VSS Perforce XML Canon ClearCase iPlanet CVS PVCS Q.What are the different modes of service invocation? Answer: Services can be invoked in several ways.
- A one-way operation is executed once and does not wait for a response.
- A request-response operation is executed once and waits for one response. In a request-response service, communication flows in both directions. The complete interaction consists of two point-to-point messages—a request and a response. The interaction is only considered complete after the response has arrived.
- Publication (notification) means an operation sends information on an as-needed basis, potentially multiple times.
- Subscription means incoming information is processed on an as-needed basis, potentially multiple times.
Q.What is vcrepo.dat? Answer: TIBCO Designer creates a file named vcrepo.dat in the project root directory when you first save the project. This file is used to store properties such as display name, TIBCO Rendezvous encoding, and description. This file can be used for identification in place of the project root directory and can be used as the repository locator string (repoUrl). Q.What are the TIBCO BW activities that can participate in transactions? Answer: Not all TIBCO BusinessWorks activities can participate in a transaction. Only the following types of activities have transactional capabilities:
- JDBC activities
- JMS activities
- ActiveEnterprise Adapter activities that use JMS transports
- EJB activities
- TIBCO iProcess BusinessWorks Connector activities
Q.What are the different types of Transactions TIBCO provides? Answer: TIBCO BusinessWorks offers a variety of types of transactions that can be used in different situations. You can use the type of transaction that suits the needs of your integration project. When you create a transaction group, you must specify the type of transaction. TIBCO BusinessWorks supports the following types of transactions:
- Java Transaction API (JTA) UserTransaction
- XA Transaction
Q.What activities are supported in JTA Transaction? Answer: The Java Transaction API (JTA) UserTransaction type allows:
- ActiveEnterprise Adapter (using JMS transports)
- EJB activities
to participate in transactions Q.What activities are supported in XA Transaction ? Answer: The XA Transaction type allows:
- JDBC activities
- ActiveEnterprise Adapter activities that use the JMS transport
- JMS activities
to participate in transactions. Q.What are the possible Error output's of Read File activity? Answer: Integration can be at different application layers:
- FileNotFoundException :Thrown when yhe file does not exist.
- UnsupportedEncodingException:Thrown when the text file’s encoding is not valid and the content of the file is read into process data.
- FileIOException :Thrown when an I/O exception occurred when trying to read the file.
Q.What is the purpose of the inspector activity ? Answer: The Inspector activity is used to write the output of any or all activities and process variables to a file and/or stdout. This is particularly useful when debugging process definitions and you wish to see the entire schema instead of mapping specific elements to the Write File activity. Q.What are the maximum/minimum of threads available for incoming HTTP ? Answer: The maximum/minimum of threads available for incoming HTTP : 75/10 Q.How can unauthorized users be prevented from triggering a process ? Unauthorized users be prevented from triggering a process by giving 'write' access for the process engine to only selected users. Only users with 'write' access can do activities like deploying applications, starting/stopping process engines etc. Q.What are the mandatory configuration parameters for FTP Connection & FTP with firewall ? Answer: The mandatory configuration parameters for FTP Connection
- FTP host
- Username & Password>
If Firewall is enabled in addition the proxy host and port are required. Q.How to use legacy .dat file format with latest designer ? Answer: Convert .dat file to multi file project using Administration tab while starting up Designer(Other one being Project tab) and then open the multifile project in the normal way. Q.What are the encodings supported by designer ? Answer: Encodings supported by designer are
Q.What are the 4 main panels of the Designer window ? Answer: The 4 main panels of the Designer window are
- Project panel
- Palette panel
- Design panel
- Configuration panel
Q.How do you determine if there are broken references in the project? Project -> Validate for deployment Q.Where are the Designer preferences stored ? Answer: Designer preferences stored are stores in a file called 'Designer .prefs' in the user home directory. Q.What are the options for configuring storage for process engine's checkpoint repository ? Answer: The options for configuring storage for process engine's checkpoint repository are:
- Local File
- Database. Fault tolerant engines can recover from a checkpoint only when database is used.
Q.Process engines in a fault tolerant group can be configured as peers or master secondary.How do these differ ? Answer: The options for configuring storage for process engine's checkpoint repository are:
- - Peer means all of them have the same weight. In this case when one engine fails another one takes over and continues processing till it fails.
- - In master secondary configuration weights are unequal, the secondary starts processing when master fails. But when master recovers, secondary stops and master continues processing.
Q.What are the uses of grouping activities ? Answer: Uses of grouping activities are:
- Create a set of activities having a common error transition.
- Repeat group of activities based on a condition.
- - Iterate over a list.
- - Repeat until condition true.
- - Repeat on Error until condition true.
- Group activities into a transaction.
- To create a critical section area that synchronizes process instances.
- A 'Pick First Group' allows you to wait for the occurence of multiple events and proceed along a path following the first event to occur.
Q.What is the purpose of a Lock shared configuration resource? Answer: A Lock is specified for a 'Critical Section' group when the scope is 'Multiple'. It can be used to ensure synchronization across process instances belonging to multiple processs definitions or for process instances across engines(Check multi engine flag for lock in this case and the BW engine needs to be configured with database persistence while deployment). If synchronization is for process instances belonging to the same processs definition inside one engine, just specify the scope as 'Single'. Q.How to control the sequence of execution of process instances created by a process starter ? Answer: Use the sequencing key field in the Misc tab of any process starter. Process instances with the same value for this field are executed in the sequence in which they are started. Q.Can there be two error transitions out of an activity ? Answer: No. There can be only one Error and one Success if no matching condition transition out of each activity. Q.When is a 'No Action' group used ? Answer: 'No Action' group used to have a set of activities having a common error transition Q.What activity can be used to set the value of a 'User defined process variable' ? Answer: The 'Assign' activity can be used to set the value of a 'User defined process variable'. Q.Which mechanism can be used to pass data between a process instance and a called sub process other than mapping from/to the callee's input/output ? Answer: This can be accomplished using job shared variables, unless in the call process activity the 'Spawn' flag is enabled in which case the called sub process is a new job and hence gets a fresh copy of the job shared variable initialized as per its configuration. A shared variable can overcome this limitation as it's scope is not limited to one job. Q.What are the three scenarios where BW engine has to be configured with database persistence instead of Local File ? Answer: The three scenarios are:
- Shared Variables across BW engines.
- Locking across groups in multiple BW engines.
- Wait Notify across BW engines.
Q.If you want a group to be executed if there is some unhandled error but subject to some max number of iterations which group do you use ? Answer: We can use Repeat on Error until true Q.When is a 'Generate Error' activity useful? Answer: When you handle an error inside a called subprocess or group and want to rethrow the error to the caller(happens by default if you dont handle the error in the called process) Q.Which activity is used for detecting duplicate message processing? Answer: CheckPoint activity - Specify the uniqueID for the duplicate key field and engine maintains list of these key fields. When a process come to checkpoint activity with the same value for duplicate key which already exists, it throws a DuplicateException. An error transition can then handle this case. Q.Give an example where graceful migration of service from one machine to another is not possible. Answer: HTTP Receiver. In this case the receiver on new machine starts listening on the same port, but you need to redirect requests from the old machine to the new one. Q.What are the types of adapter services ? Answer: Types of adapter services are :
- Subscriber Service
- Publisher Service
- Request-Response Service
- Request-Response Invocation Service
Q.If the business process needs to invoke another web service which resource do you use ? Answer: SOAP request reply activity. If the business process needs to be exposed as SOAP service use SOAP Event Source in conjunction with SOAP Send Reply or SOAP Send Fault. Q.What is the functionality of the Retrieve Resources resource? Answer: It can be used to serve the wsdl file of a SOAP Event Source to a (http) client. Construct a process like: HTTP Receiver -> Retrieve Resources -> Send HTTP Response Now the WSDL file for a SOAP service can be retreived using the http request http://://?wsdl where 'path' is the folder path to the SOAP Event Source process and 'resourceName' is the name of the process Example : http://purch:8877/Purchasing/GetPurchaseOrder?wsdl Q.What is the scope of user defined process variables ? Answer: The scope of user defined process variables is only the process in which it is defined.(Not even inside a sub process that is invoked from this process) Q.What is difference between shared variable and job shared variable ?
- Both of them can be manipulated via the palette resources 'Get shared variable' and 'Set shared variable'.
- A job shared variable is private to one instance of job or in other words each job has a fresh copy. In the case of shared variable the same copy is shared across all job instances. It can even be persisted and can survive BW engine restarts and even shared across multiple BW engines(when deployed using DB persistence).
Q.How do wait-notify resources work ? Answer: Basically wait and notify should share a common notification configuration which is just a schema definition for data that will be passed from notifier to waiter. Specific instances of waiter & notifier are corrrelated via a key. For example: when one process is in wait state for key 'Order-1', it waits till another process issues a notification with the same key value. Q.What is the default Axis in XPath ? Child axis- What this means is that when you select "BOOK" from the current context, it selects a child node with that name, not a sibling with that name. Other axes are parent , self , sibling etc. Q.What are the output formats for XSLT?
Q.What is the other JMS activity you would use to address the problem? Answer: Get jms queue message. This incorporates a message ID to identify the true message. Q.What are the activities you used to publish the messages from BW process to network on RV? Answer: publish rv message activity (along with the shared resource – rv transport). Q.What does ' Success if no matching condition' transition mean ? Answer: Lets say between two nodes N1 and N2, there are 3 success transitions with condition and there is no success transition without condition. If none of the conditions match then a 'Success if no matching condition' transition can be used. Also if there is a success transition and also success transitions with condition and if the condition matches then both the sucess transition (no condition) as well as the transition(s) with matching conditions are followed. So you can use 'Success if no matching condition' to prevent duplicate paths of execution. Q.What is the Purpose of $_error variable ? $_error variable is available in the node following the error transition. It captures the error message, error code etc. Q.On what destinations can you use multicast? a. Topics Q.Suppose, you got an error while accessing a queue, that you don’t have necessary permissions to access the queue. What might be the solution/reason? Answer: The user that is assigned to the queue and the user used while creating Q.How does the secondary server know that the primary server is failed? Answer: Based on heartbeat intervals Q.What is JMS queue requestor? Answer: The JMS Queue Requestor activity is used to send a request to a JMS queue name and receive a response back from the JMS client Q.What is JMS topic requestor? Answer:The JMS Topic Requestor activity is used to communicate with a JMS application’s request-response service. This service invokes an operation with input and output. The request is sent to a JMS topic and the JMS application returns the response to the request. Q.How do you add ems server to administrator? Answer: Using domain utility Q.How do you remove individual messages from destinations? Answer: Using purge command. Q.What is a TIBCO Domain? Answer: Domain is a collection of hardware and software components that are used for business process integration. The domain defines the TIBCO BusinessWorks environment. Each domain must contain one and only one administration server. Each domain must have a unique domain name. Each domain may contain one or more machines but no single machine can belong to multiple domains. Each machine may have more than one type of software component. Q.What is a deployment? Answer: A deployment is a completed configured instance of an integration or project. TIBCO Designer is used to configure projects and deployments in current version. In the future, TIBCO Administrator will be used to manage deployment of projects. Q.What is the main responsibilities of the Admin server? Answer:It manages data storage for the Admin It manages tr: port options for applications It enforces security for the domian Q.What is TIBCO HAWK agent? Answer: It is the independent process that monitors applications and systems utility. Q.What are the Scripting utilities? There are two types of scripting utilities. They are 1. Buildear 2.Appmanage Q.What are the components of the TIBCO Admin? What is its use? Admin server: It manages resource in Admi domian Admin GUI: It [provides web browser interface. It allows to configure users and applications, deploys applications, monitor process and machines in admin domain. Q.Can we run multiple administrators in the same domain? Answer: No. Only one administration server is installed and configured for use per domain. Q.What is the default port where admin runs? Answer: Port: 8080 Host: Localhost Q.What is UDDI module? Answer: Universal, description, discovery and integration. It creates connections between uddi servers and web services contained in the server. If you grant permissions then you can publish web services information through uddi servers. Q.What is Resouce management? Answer: It creates application domian. It can customize machine display. It displays information about machines and process on machine. Q.What is application domain? Answer: This applicatio stores the data separetely or independently in a repository from the admin domian repository. Q.What is an Application Archieve? Answer: It provides information about the enterprise archieve file including package name, version, description and creation date. Q.Can we change the adapter from one domain to another? Answer: Yes, but you will need to uninstall the existing adapter that has joined the current domain and then reinstall the adapter and join it to the new domain. You will also be able to change the domain info directly using Domain Utility . Q.How to view tracing results for a process engine? Answer: Got to Application Management click on All service instances, click on the process engine name tracing tab, go to details Q. What is deployment choice? Answer: When configuring adminstration domian , you can set how the admin server creates and stores application data. 1. Local application data 2. Server based application data Q.What are the versions of TIBCO Admin? Answer: There are two types of two versions. 1) Repository Edition 2) Enterprise Edition. Q.Can we change the domain for one machine to another later? Answer: Yes, you can add/remove machine from domain using Damain Utility. Q.What are the restrictions of using TIBCO Admin GUI via secondary server? Answer: We cannot perform user management, deploy applications or perform any other activity for which read write access is required. Q.What do you have in the User management module? Answer: Users Roles Security Q.What TIBCO Administrator do? Answer: TIBCO Administrator supports security administration as well as monitoring and management of processes and machines. TIBCO Administrator consists of the TIBCO Administration Server and the web browser based TIBCO Administrator GUI. Q.What are TIBCO Administrator Modules ? Answer: User Management Resource Management Application Management Q.What are the cases where business process cant proceed correctly subsequent to restart from a checkpoint ?
- Sending HTTP response, confirming an email/jms message etc. This is because the confirmation or sending HTTP response has to done in the same session. When engine crashes these sessions are closed at their socket level. In such cases send response/confirm before checkpoint.
Q.Which group do you use to wait for multiple events and proceed with the first to occur ? A 'Pick First Group'. Q.What are the two storage methods used by Tibco EMS server? Answer:File based and database Q.what files are created in file based data storage method? Answer: sync.db,async.db,meta.db Q.What information does Meta.db contain? Answer: durable subscribers, fault tolerant connections and other meta data. Q.What does flow control property specifies ? Answer: specifies the maximum size of the pending messages in server. Q.What are the destinations of messages? Answer: topics and queues. Q. In how many ways destinations for messages can be created? Answer: static administrator creates destinations and client programs uses the destinations Dynamic: here client program creates destinations during runtime Temporary: servers connected through routes communicate through temporary destinations. Q.what are the messaging models supported by ems serve? Answer:point to point ( queues), pubsub (topics), multicast (topic). Q.What is the diff between exclusive queues and non exclusives ? Answer:in exclusive – only one receiver can take message where as in non exclusive many receivers can receive msg. Q.how long the message will be stored for durable subscribers? Answer:as long as durable subscriber exists or until msg expiration time reached or storage limit has been reached. Q.what are the different delivery modes supported by ems? Answer:persistent, non persistent and reliable. Q.what is the dis advantage of reliable mode delivery? Answer:in reliable , with out knowing the status of the consumer the producer keeps sending msg to server Q.what is the condition for persistent message to be stored on disk in topics? Answer:there must be atleast one durable subscriber or one must be connected to fault tolerant connection to ems server. Q.how do you distinguish dynamic queues and static queues.? Answer:dynamic queues have * before the queue name. Q.what happens if npsend_checkmode parameter in tibemsd.conf file is enabled? Answer:Server sends acknowledgement for non persistent message. Q.what is shared state in fault tolerant operation ? Answer:primary server and backup server have connection to shared state which contain information about client connection and persistant messages. Q. How many ways a back up server detects failure of primary server? Answer:Hearbeat failure:-Primary server sends a heartbeat message to backup server to indicate primary server is working. connection failure :-backup server detects the failure of tcp connection with primary server Q.what is the use of locking in fault tolerant operation? Answer: Inorder to prevent the backup server to take the role of primary server, the primary server logs the shared state in normal operation and during the failure of primary server backup server takes the lock and access primary server. Q.If authorization is enabled in tibemsd.config file what is the condition to configure ems server as fault tolerance? Answer: Server name and password for both primary and backup server should be same and username and password for both servers should match the server and password parameters in tibemsd.config file. Q.What are the changes to be made in config file for ems fault tolerant operation? Answer: in primary server give url of backup server to ft_active parameter and in backup server give url of primary server for ft_active parameter. Q.Different types of zones? Answer:Multihop zone and 1hop zone. Q.What is fail safe? Answer: In fail safe mode messages are frist stored in disk before sending messages so that no messages are lost. Q.What is the default port number for ems server? Answer: 7222. Q. Difference between rendezvous and ems? Answer:Rvd is bus based architecture , ems is centralized architecture Q.what are different acknowledge modes? Answer:Dups_ok_acknowlwdge,auto_acknowlwdge,client_acknowledge,no_acknowledge. Q.How many ways we can determine the life span of the message in a queue. What are they? Answer: expiration parameter in queue configuration file. JMS expiration time in queue sender. The JMS expiration time in queue sender overrides any value given in config. Q.What are the message storing mechanisms of queues? Answer: persistent and non-persistent. Persistent: messages are stored to external storage before sending. Non-persistent: not stored to any external storage. The information will not be available for retrieval. Q.What is condition to create bridge? Answer:Queus and topics must be defined as global. Q.What are the advantages and disadvantages of multicasting Answer: Advantages: as the message broadcasts only once thereby reducing the amount of bandwidth used in publish and subscribe model. Reduces the network traffic. b. Disadvantages: Offers only last-hop delivery. So can’t be used to send messages between servers. contact for more on Tibco Online Training
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