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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 94813

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28375

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

Wipro,

7 29050

What is an abstract class?

DBS, Wipro,

8 27493

How can final class be used?

Accenture, Wipro,

5 27263

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

Wipro,

1 26399

Java support what type of parameter passing ?

Wipro,

7 19914

Explain the term serialization?

Wipro,

10 30987

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

Infosys, Wipro,

10 33138

What is Overriding and how can it be used?

Consagous, Wipro,

7 32973

How is serialization used generally ?

3 21197

How are Swing and AWT be differentiated?

Wipro,

3 22180

Explain pass by reference and pass by value?

IBM, Wipro,

8 32178

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25254

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 73565


Un-Answered Questions { Java J2EE }

Which sorting algorithm is best in java?

943


What are alternatives to java serialization?

1061


Why should the implementation of any swing callback (like a listener) execute quickly?

964


What is advice in spring?

360


What advantage do java's layout managers provide over traditional windowing systems?

919


Is java gui dead?

852


Describe the ear, war, and jar.

866


What is meant by class loader? How many types are there? When will we use them?

919


What is hbm in hibernate?

311


What is metadata autoproxying?

404


What is Enum in Java?

1219


hi friends, i have done my BE(CSE)at 2011 then i have joined one company before they asked me 50k so i paid but now they telling no project here so we r going to close like that so now i need any job i have good knowledge in core java and j2ee(jsp,servlet,jdbc) so if u know any job pl help me

2171


What's the servlet interface?

1041


What is servlet in spring?

379


How do you check if an arraylist is not empty?

1060