EJB Interview Questions
What are the different kinds of enterprise beans?
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 bean’s home or...........
Q:What are transaction isolation levels in EJB? A:Transaction_read_uncommitted , Transaction_read_committed ,
Transaction_repeatable_read...........
