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

Core Java (6529)
Advanced Java (552)
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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

Can we call a non-static method from inside a static method?

998

Why strings in java are called as immutable?

992

What is the difference between an inner class and a sub-class?

1018

Is it compulsory for a try block to be followed by a catch block in java for exception handling?

1014

How can we use primitive data types as objects?

961

Can variables be used in java without initialization?

1085

What is an infinite loop?

2 1255

What is an infinite loop? How infinite loop is declared?

1111

Can we use a default constructor of a class even if an explicit constructor is defined?

1106

What's the purpose of static methods and static variables?

1100

What is the difference between comparison done by equals method and == operator?

1026

When the constructor of a class is invoked?

1034

What is ternary operator? Give an example.

1082

How an object is serialized in java?

988

When we should use serialization?

1025

Un-Answered Questions { Java J2EE }

What is java awt event?

898

How does the server decide which beans to passivate and activate?

1156

can java object be locked down for exclusive use by a given thread? Or what happens when a thread cannot acquire a lock on an object? : Java thread

983

Differences between external iteration and internal iteration?

1162

what are synchronized methods and synchronized statements? : Java thread

997

Explain about method local inner classes or local inner classes in java?

1027

What are the changes in java.io in java 8 ?

1032

What mechanisms are used by a Servlet Container to maintain session information?

1173

What do you understand as dependency injection (di)?

511

What is the purpose of @after annotation?

1032

What is contextloaderlistener in spring?

450

What is an interoperable application in java ?

1004

What is the base class in java from which all classes are derived?

979

What is a char in java?

1039

What is the difference between a generic servlet and http servlet?

998

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