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Java Related 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 79200

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 15302

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

Wipro,

7 15998

What is an abstract class?

DBS, Wipro,

8 14555

How can final class be used?

Accenture, Wipro,

5 14692

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

Wipro,

1 14039

Java support what type of parameter passing ?

Wipro,

7 18725

Explain the term serialization?

Wipro,

10 17561

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

Infosys, Wipro,

10 19519

What is Overriding and how can it be used?

Consagous, Wipro,

7 19946

How is serialization used generally ?

 3 8682

How are Swing and AWT be differentiated?

Wipro,

3 9444

Explain pass by reference and pass by value?

IBM, Wipro,

8 18913

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 12738

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 58499

Un-Answered Questions { Java Related }

What is Remote Server?

1916

What are devices?

732

Do we need to manually write Copy Constructor?

809

How can the session in servlet be destroyed?

900

Is there a sort function in java?

789

What is runtime locatable code?

1146

What is equals method in java?

771

What is the difference between plain-validator and field-validator?

750

Can you sync the node when nodeagent is down?

857

Describe 2 different ways to concatenate two strings.

939

What is 32 bit float?

782

Is java 11 paid version?

741

Can a hashset contain duplicates java?

721

When should a function throw an exception?

844

What is the Hibernate proxy?

409

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