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 - When a remote 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 remote session bean.

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

C - By default we use remote session bean.

D - None of the above.

Q 3 - Which of the following is correct about mappedName 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 stateful session bean?

A - @javax.ejb.Stateless

B - @javax.ejb.Stateful

C - @javax.ejb.MessageDrivenBean

D - @javax.ejb.EJB

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 @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 @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 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 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 JNDI?

A - JNDI stands for Java Naming and Directory Interface.

B - It is a set of API and service interfaces.

C - Java based applications use JNDI for naming and directory services.

D - All of the above.