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 6997

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

1 2272

how to use crystal reports in java

2 5334

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

5 26613

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

2 5553

How do you customize ActionServlet?

Ness Technologies,

3 11600

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

10 24310

Can Container managed Bean-Managed Persistence ?

Sony,

2257

Can Container Managed Bean-Managed Transaction ?

Sony,

3 7161

important features of java which differenciate it from c++

3 7288

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

2 6365

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 8508

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

5 11835

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

10 20026

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

Infosys, Synechron,

8 15332

Un-Answered Questions { Java J2EE }

Hi frnds how to lock an user when he enter wrong credentials more than 3 time using java or j2ee tech take username and password in a bean no need to connect DB and validate give me some sample application code or links its urgent for me thanks in advance

2415

Find Best Job Vacancies across the world on Jooble!

136

What is action chaining ?

1160

What is latest hibernate version?

486

Write a program to print count of empty strings in java 8?

1080

What do you know about validation plugin ?

1025

What is a constructor overloading in java?

1122

What is the difference between equals() and == in java?

1032

Explain public static void main(string args[]) in java.

1064

What are the differences between heap and stack memory in java?

1129

How to sort array in descending order in java?

987

What is parsing in java?

1033

what are the different modes of archival? Explain each mode in two lines each?

994

Write a java program to find the route that connects between Red and Green Cells. General Rules for traversal 1. You can traverse from one cell to another vertically, horizontally or diagonally. 2. You cannot traverse through Black cells. 3. There should be only one Red and Green cell and at least one of each should be present. Otherwise the array is invalid. 4. You cannot revisit a cell that you have already traversed. 5. The maze need not be in the same as given in the above example

2659

How to create a base64 decoder in java8?

1131

For More Un-Answered { Java J2EE } Questions Click Here