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Java J2EE Interview Questions
Questions Answers Views Company eMail

What is garbage collection in Java, and how can it be used ?

Accenture, HCL, Infosys, Sara, SITS, TCS, Wipro,

32 65991

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 10733

Differentiate constructor and a method and how are it be used?

Wipro,

7 11464

What is an abstract class?

DBS, Wipro,

7 10064

How can final class be used?

Accenture, Wipro,

5 11838

By what default value is an object reference declared as an instance variable?

Wipro,

1 12320

Java support what type of parameter passing ?

Wipro,

7 14667

Explain the term serialization?

Wipro,

10 12617

Is there is any error if you have multiple main methods in the same class?

Infosys, Wipro,

10 14466

What is Overriding and how can it be used?

Consagous, Wipro,

7 16094

How is serialization used generally ?

3 6179

How are Swing and AWT be differentiated?

Wipro,

3 7229

Explain pass by reference and pass by value?

IBM, Wipro,

8 14781

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 9841

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 46047







Un-Answered Questions { Java J2EE }

What is digest authentication?

253


What is backdrop?

292


Explain deployment descriptors?

269


What is another word for methodology?

223


What exceptions occur during serialization?

284






EDS (Electronic Data Systems India Pvt Ltd) at Chennai on 16-12-2006.

8143


What is the purpose of @element annotation annotation?

282


How is forward action used for integration?

254


How to get the IP address of client in servlet?

323


How would you deal with slow application complaint from clients?

254


What is com mysql jdbc driver?

217


What is the master repository?

237


How can we work with error tags?

261


What is a protected class in java?

233


Why use a datasource when you can directly specify a connection details? (in a J2EE application)

2968