EJB Online Quiz

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

A - User data can be saved to database via entity beans.

B - User data can be retrived from the database in the entity bean.

C - This type of bean represents persistent data storage.

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 mappedName 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 annotation is used to specify that a given ejb class is a message driven bean?

A - @javax.ejb.Stateless

B - @javax.ejb.Stateful

C - @javax.ejb.MessageDrivenBean

D - @javax.ejb.EJB

Q 5 - @javax.ejb.PostActivate annotation is used to specify callback method of ejb lifecycle.

A - false

B - true

Q 6 - Which of the following is correct about @PrePassivate 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 Default interceptor in EJB?

A - Such interceptor is invoked for every method of the bean.

B - Such interceptor is invoked for every bean within deployment.

C - Such interceptor is invoked for a particular method of the bean.

D - None of the above.

Q 8 - Which of the following is correct about a Consistent 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 JNDI?

A - JNDI stands for Java Naming and Directory Interface.

B - It is a set of API and service interfaces.

C - Java based applications use JNDI for naming and directory services.

D - All of the above.