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

how to implement singletun design patteren in struts?

HCL,

5 13431

Is Cegonsoft Pvt.Ltd. a good Institute?

4 6952

GoldMansachs Interview process....

Goldman Sachs,

1 11613

HI ALL, How to Overcome "OutOfMemoryException"? when I am compiling source having more than 1000 LOC throwing this exception. Can any one give correct answer to my question? thx

5 6874

Hi all, I am dng a mini project on FileSplitter application which splits the GBs of logfile into Smaller chunks(mbs) depending on the split size." How to handle GBs file? I am getting OutOfMemoryException, when I input such GB sized file. Thx

2134

The class "Class" is belongs to which package?? a) java.lang b)java.lang.reflect c)java.util d)None

4 9370

which of tha following is not a thread safe class? a) ArrayList b)Vector c)HashTable d)None

17 20168

Explain the role played by Java Virtual Machine in Java Programming?

1 6191

Explain role of constructor in a java application?

5 14225

Where can i get Latest SUN Certification Dumps and what are the Sun Certification Codes that are available, Im new to JAVA, so please gimme info as i need to write J2EE - Core Java Certification

1868

This is my code i have a doubt class ab implements a,b { public void add() { System.out.println("Hi") } } interface a { public void add(); } interface b { public void add(); } in this code i have two interface implemented in the class has same method.just i want to know which method of interface implemented in the class. interface a or interface b? confused me .

3 5086

IN java collections we have both interfaces and classes. instead of using interfaces why we can't use classes only like that why we can't use interfaces only. why we need two things interface and class.

Accenture, CTS,

6 10606

Differences between jdk 1.4 and 1.5

SoftSol, TCS, Wipro,

6 17591

which method does it invokes automatically when we click link in the webpage a)put b)get c)head d)post

7 9163

what happens when we add the objects morethan the size limit to a hashmap

1 4283

Un-Answered Questions { Java J2EE }

What is difference between save and persist method in hibernate?

429

v-model life cycle

2044

What if static is removed from main method?

1072

What is autoboxing and unboxing?

1005

How do I stop concurrentmodificationexception?

1032

What is nullpointerexception in java?

1158

Why doesn’t a servlet include main()? How does it work?

1160

What are the topics in core java?

1067

How many ways we can configure hibernate?

444

What are different types of states exist for a thread?

1008

What methods are used in Servlet?Applet communication?

2247

Do you want to use hibernate 2nd level cache?

328

What are strings in physics?

1016

Give some features of interface?

1067

What are thread groups?

1004

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