EJB Online Quiz

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

A - This type of bean stores data of a particular user for a single session.

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

C - This type of bean represents persistent data storage.

D - None of the above.

Q 2 - Which of the following bean stores data of a particular user for a single session?

A - session bean.

B - entity bean.

C - message driven bean.

D - None of the above.

Q 3 - Which of the following is correct about name 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 specify the JNDI name of the message driven bean.

Q 4 - Which of the following annotation is used to specify that a given ejb class is a stateless 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 @PostRemove 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 EJB interceptors?

A - EJB 3.0 provides specification to intercept business methods calls using methods annotated with @AroundInvoke annotation.

B - An interceptor method is called by ejbContainer before business method call it is intercepting.

C - Both of the above.

D - None of the above.

Q 8 - Which of the following is correct about a transaction in EJB?

A - A transaction is a single unit of work items.

B - A transaction follows the ACID properties.

C - Both of the above.

D - None of the above.

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