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 is correct about Entity in EJB persistence API?

A - It is a persistent object representing the data-store record. It is good to be serializable.

B - it is an interface to do data operations like add/delete/update/find on persistent object. It also helps to execute queries using Query interface.

C - It describes the properties of persistence mechanism.

D - It describes the data-store related properties like connection url. user-name,password etc.

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 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 - @javax.ejb.Local annotation is used to specify Local interface(s) of a session bean.

A - true

B - false

Q 6 - Which of the following is correct about @PrePassivate annotation for a callback method?

A - Method is invoked when a bean is created for the first time.

B - Method is invoked when a bean is removed from the bean pool or is destroyed.

C - Method is invoked when a bean is loaded to be used.

D - Method is invoked when a bean is put back to bean pool.

Q 7 - Which of the following is correct about Method 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 - Which of the following is correct about @Embeddable annotation for a entity bean?

A - A java POJO to be embedded must be annotated as @Embeddable.

B - An entity bean to be embedded must be annotated as @Embeddable.

C - Both of the above.

D - None 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 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.