EJB Online Quiz

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

A - Message driven bean is a stateless bean.

B - This is a type of enterprise bean which is invoked by EJB container when it receives a message from queue or topic.

C - Message driven bean is used to do task asynchronously.

D - All of the above.

Q 2 - When a local session bean is used in EJB?

A - If ejb client is in same environment where ejb session bean is to be deployed then we use local session bean.

B - If ejb client is in different environment where ejb session bean is to be deployed then we use local session bean.

C - By default we use local session bean.

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 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 properties required for a message driven bean?

A - @javax.ejb.ActivationConfigProperty

B - @javax.ejb.Local

C - @javax.ejb.Remote

D - @javax.ejb.EJB

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

A - Method is invoked when an entity is created in 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 Class level 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 - EJB 3.0 provides support for Blob and Clob types using @Lob annotation.

A - true

B - false

Q 9 - Which of the following is correct about a DeclareRoles 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.

Q 10 - Which of the following is true about exceptions handling by EJB Container?

A - When System Exception occurs, ejb container intercepts the exception, rollbacks the transaction and start the clean up tasks.

B - EJB Container wraps the exception into RemoteException and throws it to the client.

C - Both of the above

D - None of the above.