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

Which is the better framework for web applications, struts or spring, and why?

IBM, TATA,

1 4742

Java support call by reference (pass by reference) ?

HCL,

1 4499

How to deploye the java application in web logic server please brief explain with screen shot please help me ?

4 9140

What is private static final long serialVersionUID = 1L;

Google,

3 16678

System.out & System.in are final static data member of System class but we can change there reference through setOut() & setIn() method how...

FCS, TCS,

2 6049

difference between vectorlist and hash

TCS,

1 4230

Does WLS supports CORBA?

Cap Gemini,

2 8038

why HashTable not allow null key and value

Crimson Logic,

2 22459

why string constant pool in java

TCS,

2 8966

why Bean class implements all business method of Remote interface but bean bean class not implements the remote interface

Polaris,

2467

why top level class could not be static

L&T,

3 13080

The following program is Overloading or Overriding? public class PolymorphismEx { public int sampleMethod(int a) { return a; } public String sampleMethod(int a) { return "Is it Overloading or Overriding???"; } }

Ness Technologies, TCS,

4 7602

I Have a class abstract with one abstract method, so that method should override in the subclass, but i dont want to override, if i am not override what will happen? If compilation will occur then i dont want to give compilation error, then what we need to do??? See the sample program. public abstract class AbstractExample { public abstract void sampleMethod(); } public class AbstractExampleImple extends AbstractExample { }

Mphasis,

2 6032

what is the use of module in weblogic

Polaris,

1 3601

is it mandatory to deaclare all variables public static fianl in interfaces?if i declare like in the below program, public interface A { public static final int I=0; int j=0; } in interface A,what is the difference between I,j?

2 4547

Un-Answered Questions { Java J2EE }

What is cmp in j2ee?

903

You're given a Boolean 2D matrix, can you find the number of islands?

1095

What is the purpose of the enableevents() method?

1043

What is a loop java?

1049

What is orm and its advantages?

380

What is the difference between superclass and subclass?

1169

Is hibernate open source?

334

What variables are stored in stack?

960

Is java an open source?

969

What is @required annotation in spring?

444

Difference between hashmap and hashtable?

1156

What is the form of storage space in java?

2244

Define packages in java?

1000

What is return data type?

1002

How do you check if a number is a perfect square?

992

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