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 93544

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 27983

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

Wipro,

7 28690

What is an abstract class?

DBS, Wipro,

8 27093

How can final class be used?

Accenture, Wipro,

5 27026

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

Wipro,

1 26187

Java support what type of parameter passing ?

Wipro,

7 19602

Explain the term serialization?

Wipro,

10 30572

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

Infosys, Wipro,

10 32673

What is Overriding and how can it be used?

Consagous, Wipro,

7 32619

How is serialization used generally ?

3 20938

How are Swing and AWT be differentiated?

Wipro,

3 21985

Explain pass by reference and pass by value?

IBM, Wipro,

8 31762

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25035

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 72642

Un-Answered Questions { Java J2EE }

Can you use this() and super() both in a constructor?

881

Why does java does not support multiple inheritance? Explain

884

What are sets in java?

840

Which methods are used during serialization and deserialization process?

894

What is id generator in hibernate?

320

Why do we need spring boot starter parent? : Spring Boot

320

What is the difference between controller and task command.

858

What do you mean by session tracking and also explain its techniques?

854

Can an interface have a class?

896

What is the difference between the jdk 1.02 event model and the event-delegation model introduced with jdk 1.1?

1026

What is the SimpleTimeZone class?

2173

How do you check whether the list is empty or not in java?

884

What is a 1 to 1 relationship database?

331

Brief description about local interfaces?

1133

What is servlet container?

1025

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