EJB Online Quiz

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

A - Session bean stores data of a particular user for a single session.

B - Session bean can be stateful or stateless.

C - Session bean is less resource intensive as compared to entity beans.

D - All of the above.

Q 2 - Which of the following bean is represents persistent data storage?

A - session bean.

B - entity bean.

C - message driven bean.

D - None of the above.

Q 3 - Which of the following is correct about messageListenerInterface 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 specify the JNDI name of the message driven bean.

Q 4 - Which of the following annotation is used to specify or inject a dependency as ejb instance into another ejb?

A - @javax.ejb.Stateless

B - @javax.ejb.Stateful

C - @javax.ejb.MessageDrivenBean

D - @javax.ejb.EJB

Q 5 - Which of the following is true about @javax.ejb.Remote annotation?

A - @javax.ejb.Remote annotation is used to specify Remote interface(s) of a session bean.

B - This remote interface states the business methods of the session bean (which can be stateless or stateful).

C - This interface is used to expose the business methods to remote clients which are running in different deployment/application as EJB.

D - All of the above.

Q 6 - Which of the following is correct about @PostConstruct annotation for a callback method?

A - Method is invoked when a bean is created for the first time.

B - Method is invoked when a bean is removed from the bean pool or is destroyed.

C - Method is invoked when a bean is loaded to be used.

D - Method is invoked when a bean is put back to bean pool.

Q 7 - Which of the following is correct about timer service in EJB?

A - Timer Service is a mechanism using which scheduled application can be build.

B - EJB Timer Service is a service provided by Ejb container which helps to create timer and to schedule callback when timer expires.

C - Both of the above.

D - None of the above.

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

A - A transaction is a single unit of work items.

B - A transaction follows the ACID properties.

C - Both of the above.

D - None of the above.

Q 9 - Which of the following is correct about a Start 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 Application level exception in EJB?

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

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

C - It is quite similar to HQL, hibernate query language.

D - All of the above.