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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 74522

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 13560

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

Wipro,

7 14389

What is an abstract class?

DBS, Wipro,

7 12815

How can final class be used?

Accenture, Wipro,

5 13652

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

Wipro,

1 13400

Java support what type of parameter passing ?

Wipro,

7 17180

Explain the term serialization?

Wipro,

10 15648

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

Infosys, Wipro,

10 17593

What is Overriding and how can it be used?

Consagous, Wipro,

7 18470

How is serialization used generally ?

 3 7750

How are Swing and AWT be differentiated?

Wipro,

3 8562

Explain pass by reference and pass by value?

IBM, Wipro,

8 17487

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 11725

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 54416

Un-Answered Questions { Java J2EE }

What is a nonetype?

557

What is the most important feature of java? What is an interface?

505

Explain the available thread states in a high-level?

522

How do you add an element to a set in java?

491

What is fail first in java?

560




What if static is removed from main method?

564

What is the reflection?

555

Why is spring light weight?

175

What is structure of java heap? What is perm gen space in heap?

533

What is the protected method modifier?

557

Define the lifecycle for executing a jsp page.

584

What is credentials?

501

Why spring cloud is required?

165

What are the types of advice?

171

What is difference between merge and update in hibernate?

174

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