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 name 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 mappedName attribute in @javax.ejb.EJB annotation?

A - It is used to specify name which will be used to locate the referenced bean in environment.

B - it is used to specify the interface type of the referenced bean.

C - It is used to provide name of the referenced bean.

D - It is used to specify the JNDI name of the referenced bean.

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 of the following is correct about @PostLoad annotation for a entity bean?

A - Method is invoked before an entity is to be updated in the database.

B - Method is invoked when a record is fetched from database and loaded into the entity.

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 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 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 - What JNDI stands for?

A - Java Naming and Directory Interface

B - Joint Naming and Directory Interface

C - Java Naming and Directory Intelligence

D - None of the above.