EJB Interview Questions


Q:

What are the different kinds of enterprise beans?

A: Different kind of enterrise beans are Stateless session bean, Stateful session bean, Entity bean, Message-driven bean...........
 
Q:

What is Session Bean?

A: A session bean is a non-persistent object that implements some business logic running on the server. One way to think of a session object...........
 
Q:

What is Entity Bean?

A: The entity bean is used to represent data in the database. It provides an object-oriented interface to ...........
 
Q:

What are the methods of Entity Bean?

A: An entity bean consists of 4 groups of methods, create methods...........
 
Q:

What is the difference between Container-Managed Persistent (CMP) bean and Bean-Managed Persistent(BMP) ?

A: Container-managed persistence (CMP) and bean-managed persistence (BMP). With CMP, the container manages the persistence of the entity bean............
 
Q:

What are the callback methods in Entity beans?

A: Callback methods allows the container to notify the bean of events in
its life cycle. The callback methods are defined in the javax.ejb.EntityBean interface............
 
Q:

What is software architecture of EJB?

A: Session and Entity EJBs consist of 4 and 5 parts respectively, a remote interface...........
 
Q:

Can Entity Beans have no create() methods?

A: Yes. In some cases the data is inserted NOT using Java application,...........
 
Q:

What is bean managed transaction?

A: If a developer doesn't want a Container to manage transactions, it's possible to implement all database operations manually...........
 
Q:

What are transaction attributes?

A: The transaction attribute specifies how the Container must manage transactions for a method when a client invokes the method via the enterprise beanís home or...........
 
Q:

What are transaction isolation levels in EJB?

A: Transaction_read_uncommitted , Transaction_read_committed , Transaction_repeatable_read...........
 

EJB Interview Questions

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