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 4755

Java support call by reference (pass by reference) ?

HCL,

1 4513

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

4 9162

What is private static final long serialVersionUID = 1L;

Google,

3 16695

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 6068

difference between vectorlist and hash

TCS,

1 4246

Does WLS supports CORBA?

Cap Gemini,

2 8044

why HashTable not allow null key and value

Crimson Logic,

2 22486

why string constant pool in java

TCS,

2 8985

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

Polaris,

2471

why top level class could not be static

L&T,

3 13108

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 7635

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 6047

what is the use of module in weblogic

Polaris,

1 3608

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 4564

Un-Answered Questions { Java J2EE }

What is return type in java?

1075

How many types of session beans are available in ejb?

979

What is dao in spring?

441

What is assembly language?

982

Name some OOPS Concepts in Java?

1078

What are the different types of ioc (dependency injection)?

407

What exactly are the functions of servlet?

1104

How we can configured action mapping in struts?

1014

How many types of JDBC Drivers are present and what are they?

1193

Why we use methods in java?

1003

What is difference between throw and throws ?

1140

For ejb applications with bean-managed transaction demarcations, which of the following is used by the client to get a reference to the usertransaction object for the weblogic server domain? : BEA Weblogic

964

What is JDBC DataSource and what are it’s benefits?

1218

What are runtime exceptions?

1163

What is the purpose of default constructor?

1002

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