ejb interview questions and answers

XPuja Basuwhat is the difference between EJB and JavaBeans?
XAnamika chakrabartyWhat are the different kinds of enterprise beans?
Xsrinu reddynew fearures in Ejb 3.x ?
XPuja Basuwhat is the difference between session and entity beans?
XAnamika chakrabartyWhat are the callback methods in Entity beans?
XDinabandhu RaulWhat is the diffrence between EJB2 and EJB3 and what are the advantage and disadvantages in EJB3.
XAtul goyalwhy EJB transaction is secure ?
No Questions

new fearures in Ejb 3.x ?

May 07 2012

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May 07 2012

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May 07 2012

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May 07 2012

why EJB transaction is secure ?

June 29 2011

what is the difference between session and entity beans?

May 06 2011

Session Bean is non persistent & used to implement business logic. Relatively short live for particular client event.

Entity bean is persistent and represent a row in database.And they are long live and can survive JVM crash.

May 06 2011

what is the difference between EJB and JavaBeans?

May 06 2011

JavaBean are GUI Component & follow java bean conventions(set/get/is etc).

EJB are Server side business component & follow EJB specifications.

May 06 2011

JavaBean are GUI Component & follow java bean conventions(set/get/is etc).

EJB are Server side business component & follow EJB specifications.

May 06 2011

What is the diffrence between EJB2 and EJB3 and what are the advantage and disadvantages in EJB3.

May 06 2011

What are the callback methods in Entity beans?

April 05 2011

Callback methods are life cycle methods for Enterprise beans. This methods are automatically calls by ejb container. They are listed below :
(a) setEntityContext()

(b) ejbCreate()

(c) ejbPostCreate()

(d) ejbActivate()

(e) ejbPassivate()

(f) ejbRemove()

(g) unsetEntityContext()

April 05 2011

What are the different kinds of enterprise beans?

April 05 2011

There are three Enterprise beans as part of EJB 3.0
1.Session Bean
Session bean model business process They are like verbs as they perform actions
2.Entity Bean ( deprecated )
They are nouns because they are data objects.
3.MDB(Message Driven Bean)

April 05 2011