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 94851

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28395

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

Wipro,

7 29060

What is an abstract class?

DBS, Wipro,

8 27498

How can final class be used?

Accenture, Wipro,

5 27271

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

Wipro,

1 26406

Java support what type of parameter passing ?

Wipro,

7 19922

Explain the term serialization?

Wipro,

10 31004

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

Infosys, Wipro,

10 33162

What is Overriding and how can it be used?

Consagous, Wipro,

7 32980

How is serialization used generally ?

3 21204

How are Swing and AWT be differentiated?

Wipro,

3 22192

Explain pass by reference and pass by value?

IBM, Wipro,

8 32184

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25256

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 73601

Un-Answered Questions { Java J2EE }

What's the difference between spring and spring boot? : Spring Boot

441

Explain the concept of hashtables?

1072

Write a program to calculate factorial in java?

962

Explain the mechanism by which you can distinguish between transient (i.e. Newly instantiated) and detached objects in hibernate?

360

what is session in java?

1190

What is dao in spring boot? : Spring Boot

402

Explain the persistent classes in hibernate?

385

How do I find jdbc version?

963

What is the default thread stack size in windows?

958

How to change the priority of thread or how to set priority of thread?

988

How does dao work? : Spring Boot

412

Explain where are the files placed while deploying the resource adapter in web logic server?

956

What are the phases of servlet life cycle?

1066

Why is it called struts?

897

Is there any difference between nested classes and inner classes?

1039

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