EJB Online Quiz

Q 1 - Which of the following is true about EJB?

A - Simplified development of large scale enterprise level application.

B - Application Server/ EJB container provides most of the system level services like transaction handling, logging, load balancing, persistence mechanism, exception handling and so on.

C - EJB container manages life cycle of ejb instances thus developer needs not to worry about when to create/delete ejb objects.

D - All of the above.

Q 2 - Which of the following is true about stateful bean?

A - EJB Container creates a separate stateful session bean to process client's each request.

B - As soon as request scope is over, statelful session bean is destroyed.

C - Both of the above.

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 annotation is used to specify that a given ejb class is a stateful session bean?

A - @javax.ejb.Stateless

B - @javax.ejb.Stateful

C - @javax.ejb.MessageDrivenBean

D - @javax.ejb.EJB

Q 5 - Which of the following annotation is used to specify Local interface(s) of a session bean?

A - @javax.ejb.Stateless

B - @javax.ejb.Stateful

C - @javax.ejb.Local

D - @javax.ejb.EJB

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

A - Method is invoked before an entity is to be updated in the 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 annoatation is used to inject SessionContext into an ejb?

A - @EJB

B - @Resource

C - Both of the above.

D - None of the above.

Q 8 - Which of the following types of java classes can be mapped using @Lob annotation?

A - byte[]

B - String

C - Serializable Object

D - All of the above.

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

A - Indicates that business method will execute as part of transaction otherwise exception will be thrown.

B - Indicates that a new transaction is to be started for the business method.

C - Indicates that business method will execute as part of transaction.

D - Indicates that business method should not be executed as part of transaction.

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.