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 94801

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28368

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

Wipro,

7 29045

What is an abstract class?

DBS, Wipro,

8 27490

How can final class be used?

Accenture, Wipro,

5 27260

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

Wipro,

1 26396

Java support what type of parameter passing ?

Wipro,

7 19909

Explain the term serialization?

Wipro,

10 30976

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

Infosys, Wipro,

10 33129

What is Overriding and how can it be used?

Consagous, Wipro,

7 32968

How is serialization used generally ?

3 21191

How are Swing and AWT be differentiated?

Wipro,

3 22173

Explain pass by reference and pass by value?

IBM, Wipro,

8 32174

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25250

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 73555

Un-Answered Questions { Java J2EE }

What are strings in physics?

970

What is the use of struts config xml file?

815

Why are generics used?

915

What is struts2 framework?

887

What are the two mapping associations used in hibernate?

390

What is the use of inner class?

1000

Explain inner classes ?

1079

What are the two types of collections in hibernate?

431

What causes the condition OUT OF MEMORY?

928

Explain about the tag?

1054

What’s the difference between @component, @repository & @service annotations in spring?

398

In which method of action class the business logic is executed?

938

How do I know if java is installed?

1025

What is array and arraylist in java?

1052

tell me the permenent memory issues?

2659

For More Un-Answered { Java J2EE } Questions Click Here