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

when i write string s1="java"; in one program(application) and string s2="java"; in another application on the same jvm will both objects s2,s2 will refer to same memory location where "java" is stored in string pool.

2 5674

Is Struts Action class Thread Safe?

Wipro,

14 53521

Why operator overloading is not in Java?

2077

What is the difference between throw and throws? What is the similarity between try and throw?

2 5747

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

HCL,

1 4713

What is the need of "creating and throwing an UserdefinedException" when the "Exception" class is already available?

4 6764

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

ADP,

2 8860

What is JIT ?

Satyam,

4 10047

How to implement or use the singleton class in java?

3 8096

can we add two numbers without using arthematic operators? if possible how?

CTS,

5 9713

why the equals method can be override?when we override the equals method?

5 11111

why the wait,notify,notifyall methods are placed in object class?these are the thread concepts why these methods are placed in Object class?

Global Logic, Satyam,

2 11558

using equals method overriding which objects are compared?i.e same class objects or other class objects?Explain me.

4 6413

If set accepts only one argument then how can it compare two objects to avoid duplicates

5 7153

can u override the start() method of Thread class

5 20166

Un-Answered Questions { Java J2EE }

Write a program to check string is palindrome without using loop?

1035

What is nullpointerexception?

1074

What is the java reflection api? Why it’s so important to have?

980

What is the procedure of operation of a form tag?

963

How arrays are stored in memory in java?

980

what is an isolation level?

2761

Should services be stateless?

929

What is function overriding and overloading in java?

1112

Mention some important annotations used for hibernate mapping?

338

What is difference between path and classpath?

1175

the same information whether it will connect to the database or it will be used previous information?

1043

What is included in core java?

1058

Explain the difference between treeset and treemap in java?

972

Define "Access specifiers" in java.

1173

What is a layout manager and what are different types of layout managers available in java awt?

1246

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