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 is true about stateless bean?

A - EJB Container normally creates a pool of few stateless bean's objects and use these objects to process client's request.

B - Because of pool, instance variable values are not guaranteed to be same across lookups/method calls.

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 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.ActivationConfigProperty annotation is used to specify properties required for a message driven bean.

A - true

B - false

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 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 - What ACID stands for?

A - Atomic, Consistent,Isolated and Durable

B - Acurate, Correct,Isolated and Durable

C - Atomic, Consistent, Identical and Done

D - None of the above.

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

A - Indicates that business method has to be executed within transaction otherwise a new transaction will be started for that method.

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 correct about a RolesAllowed attrribute of Container Managed Transactions in EJB?

A - Indicates that class will accept those declared roles. Annotations are applied at class level.

B - Indicates that a method can be accessed by user of role specified. Can be applied at class level resulting which all methods of class can be accessed buy user of role specified.

C - Indicates that business method is accessible to all. Can be applied at class as well as at method level.

D - Indicates that business method is not accessible to any of user specified at class or at method level.