Top 32 Tibco Interview Questions And Answers Pdf

1. What are file-based storage and database storage in TIBCO EMS and where we will configure it?
Answer: In file-based store, all messages will be saved on disk. Whereas in database storage all messages will write on DB. If we check in stores.conf we can find file storage and database storage. By default, any message will be stored in the file.
Note: In EMS 6.0 there is no concept of server or database storage. By default, all the messages get stored on the disc itself.

2. What is vcrepo.dat and when this file is created in TIBCO?
Answer: Vcrepo.dat file is used to store certain properties like TIBCO RV encoding, display name; description, etc. vcrepo.dat file gets created automatically when a TIBCO BW project is saved for the first time. This file can be used for identification purposes.

3. While debugging TIBCO BW processes, which activity can be used to write complete schema information to a file?
Answer: TIBCO provides Inspector activity which can be used for debugging purposes while developing applications in TIBCO designer. Inspector activity can be used to write all output information of designer activities to a local file including process variables and other details.

4. What are the options for configuring storage for the process engine’s checkpoint repository?
Answer:
The options for configuring storage for process engine’s checkpoint repository are:

Local File: Information is stored in a local file which in case of engine crash/failure and the same information is used to resume the process flow once an engine is up. This mechanism works only in the case of a single server or load balancing approach.
Database: Information is stored in a database table which is used to resume the engine later. Fault-tolerant engines can recover from a checkpoint only when the database is used.

5. If there are three activities in the critical section, JDBC update then a write file and then again JDBC update. If the second JDBC update fails, then what will happen to the file written by write file activity?
Answer:
The contents of the file will persist.

6. What are prefetch and fail-safe?
Answer: Prefetch is fetching the messages from the server before receiver calls. Failsafe property enables us to write persistence messages to the file with synchronous i/o calls.

7. What is SQL direct? What is it used for?
Answer: SQL direct is used to execute command dynamically using the output of other activities. This activity allows you to execute commands which other activities in the JDBC don’t allow, like DDL command creates a table.

8. Can you change the value of a global variable at runtime?
Answer: You can change the value of a global variable when you deploy your project in TIBCO Administrator.
See the section on modifying runtime variables in TIBCO BusinessWorks Administration for more information on using TIBCO Administrator.

You can also specify values for global variables when starting a process engine on the command line. To do this, specify the following as a command-line argument when starting the process engine:

where variablePathAndName is the name of the variable you wish to set, including the path to the variable if it is contained in a folder. Value is the value you wish to set the variable to.

For example, if you have a global variable named item1 contained in a folder named myGroup and you wish to set its value to 500, add the following argument to the command line when starting the process engine:
-tibco.clientVar.myGroup/item1 500.

9. What is the the difference between publish by value, publish by reference modes in ADB adapter?
Answer: publish by value: in this type, the changes in the source table are reflected in the p_ table and the data is taken from there. its used when high speed is required. it does not support data types like oracle long.

publish by reference: in this type, the data is directly taken from the source table where only the primary key will come from the p_ table. it allows data types like oracle long.
loss of changes in the source table can be lost bcos of the waiting time.(this can be avoided using alerter).

10. What Is The Use Of Critical Section Group?
Answer: Critical section groups are used to synchronize process instances so that only one process instance executes the grouped activities at any given time.
What are the different types of transaction groups supported in TIBCO BW?

Iterate, repeat until true, repeat on error until true, critical section, transaction, pick first, while true.

11. How do you send a response from a web service?
Answer: We write to output to the queue from which we received the request.

12. What is the difference between soap event source and service palette?
Answer: The soap event source is used for a single operation, single end. Service palette is used for multiple operations, multiple end bindings like https, jms.

13. 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.14. What are the TIBCO BW activities that can participate in transactions ?_text]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

15. If you want to count the number of times a job is called, how will you go about doing it?
Answer:

Use job shared variables in a critical section.