Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java (6529)
Advanced Java (552)
Swing (223)
EJB (402)

Servlets (804)
Struts (701)
JDBC (771)
JMS (324)

SunOne (10)
J2EE (485)
Weblogic (694)
Websphere (573)

Java J2EE Interview Questions

Questions Answers Views Company eMail

What is garbage collection in Java, and how can it be used ?

Accenture, HCL, Infosys, Sara, SITS, TCS, Wipro,

32 97006

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28956

Differentiate constructor and a method and how are it be used?

Wipro,

7 29598

What is an abstract class?

DBS, Wipro,

8 28033

How can final class be used?

Accenture, Wipro,

5 27702

By what default value is an object reference declared as an instance variable?

Wipro,

1 26693

Java support what type of parameter passing ?

Wipro,

7 20497

Explain the term serialization?

Wipro,

10 31795

Is there is any error if you have multiple main methods in the same class?

Infosys, Wipro,

10 33952

What is Overriding and how can it be used?

Consagous, Wipro,

7 33582

How is serialization used generally ?

3 21518

How are Swing and AWT be differentiated?

Wipro,

3 22565

Explain pass by reference and pass by value?

IBM, Wipro,

8 32851

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25740

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 75354

Un-Answered Questions { Java J2EE }

What is resultsetextractor?

486

How many deployment descriptor files does a cmp entity bean deployed on the weblogic server have? : BEA Weblogic

1018

What is the difference between declaration and definition in java?

1164

What is a dto in spring?

490

A scenario of a network deployment cell has one cluster and an application uses jms client required to be deployed to the cluster, what are the required steps to be followed by administrator to make clients able to consume messages?

1025

Difference between static and dynamic class loading.

1191

What is struts and why it is used?

1021

What is a pojo class in hibernate?

497

How does hibernate lazy loading work?

442

Explain the main difference between entity beans and hibernate.

583

What is == mean?

1051

Why do we have servlet wrapper classes?

1119

What is the difference between inner class and nested class?

1160

What are the various channels supported by spring 2.0?

468

explain the difference between jdk and jvm?

1051

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