EJB Online Quiz

Q 1 - Which of the following is true about message driven bean?

A - Message driven bean is a stateless bean.

B - This is a type of enterprise bean which is invoked by EJB container when it receives a message from queue or topic.

C - Message driven bean is used to do task asynchronously.

D - All of the above.

Q 2 - When a remote session bean is used in EJB?

A - If ejb client is in same environment where ejb session bean is to be deployed then we use remote session bean.

B - If ejb client is in different environment where ejb session bean is to be deployed then we use remote session bean.

C - By default we use remote session bean.

D - None of the above.

Q 3 - Which of the following is correct about description attribute in @javax.ejb.Stateless annotation?

A - It is used to specify name of the session bean.

B - it is used to specify the JNDI name of the session bean.

C - It is used to provide description of the session bean.

D - None of the above.

Q 4 - Which of the following is correct about description attribute in @javax.ejb.MessageDrivenBean annotation?

A - It is used to specify name of the message driven bean.

B - it is used to specify message listener interface for the message driven bean.

C - It is used to specify the configuration details of the message-driven bean in operational environment of the message driven bean.

D - It is used to provide description of the message driven bean.

Q 5 - @javax.ejb.Local annotation is used to specify Local interface(s) of a session bean.

A - true

B - false

Q 6 - Which of the following is correct about @PostRemove annotation for a entity bean?

A - Method is invoked when an entity is created in database.

B - Method is invoked after an entity is created in database.

C - Method is invoked when an entity is deleted from the database.

D - Method is invoked after an entity is deleted from the database.

Q 7 - Which annotation is used to inject an ejb into another ejb?

A - @EJB

B - @Resource

C - Both of the above.

D - None of the above.

Q 8 - Which of the following is correct about a Atomic transaction in EJB?

A - If any of work item fails, the complete unit is considered failed. Success meant all items executes successfully.

B - A transaction must keep the system in consistent state.

C - Each transaction executes independent of any other transaction.

D - Transaction should survive system failure if it has been executed or committed.

Q 9 - Which of the following is correct about a Failed attrribute of Bean Managed Transactions in EJB?

A - When to start a transaction in a business method.

B - Identify success scenario when a transaction is to be committed.

C - Identify failure scenario when a transaction is to be rollback.

D - None of the above.

Q 10 - Which of the following is true about System level exception in EJB?

A - If business rule is voilated or exception occurs while executing the business logic will be treated as system level exception.

B - Any exception which is not caused by business logic or business code. RuntimeException, RemoteException are SystemException will be treated as system level exception.

C - Both of the above.

D - None of the above.