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

can anyone explain me the concept of autoboxing?

3 6774

what is the use of pojo (plain old java objects)? how it is interact with crystal reports? pls urgent

2180

how to use crystal reports in java

2 5200

1.what is the exact difference between applet and frame? 2.Do we use main method in frames?

5 26336

diff between abstract methods and interfaces with programing (code) example?

2 5417

How do you customize ActionServlet?

Ness Technologies,

3 11373

Is it compulsory to have atleast one abstract method in abstract class?

10 23791

Can Container managed Bean-Managed Persistence ?

Sony,

2183

Can Container Managed Bean-Managed Transaction ?

Sony,

3 6955

important features of java which differenciate it from c++

3 7106

What is the use of log4j and how to make use of that in a application?

2 6235

public class Garbage { int a=0; public void add() { int c=10+20; System.out.println(c); System.out.println(a); } public static void main(String args[]) { Garbage obj=new Garbage(); System.gc(); System.out.println("Garbage Collected"); obj.add(); } } Above is a code in java used for garbage collection. object obj has been created for the class Garbage and system.gc method is called. Then using that object add method is called.System.gc method if called the obj should be garbage collected?

6 8209

Why cant we define System.out.println() inside a class directly?

5 11590

Can we write a constructor for a Servlet class ? if yes how ? if no why not ?

10 19519

If all the methods in abstract class are declared as abstract then what is difference between abstract class and in interface?

Infosys, Synechron,

8 14921

Un-Answered Questions { Java J2EE }

What is an odbc driver?

911

What is serialversionuid?

1089

How do you stop lazy loading?

437

what is the broker domain?

863

What is the purpose of redirect result type?

1019

Can we override constructor in java?

1093

Which list is sorted in java?

1031

What is string args [] in java?

1031

Whether we can get deadlock situation in servlets?

1073

What is the reflection?

1008

What is a domain template?

989

Difference between object instantiation and construction ?

1067

Can a main method be declared final?

1056

Implementations of set interface?

1013

What is unicode with example?

1210

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