Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java 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 94633

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28315

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

Wipro,

7 29003

What is an abstract class?

DBS, Wipro,

8 27433

How can final class be used?

Accenture, Wipro,

5 27226

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

Wipro,

1 26375

Java support what type of parameter passing ?

Wipro,

7 19859

Explain the term serialization?

Wipro,

10 30919

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

Infosys, Wipro,

10 33050

What is Overriding and how can it be used?

Consagous, Wipro,

7 32927

Explain pass by reference and pass by value?

IBM, Wipro,

8 32112

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25219

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 73400

Is there any need to import java.lang package?

Sun Microsystems,

13 25043

What is UNICODE?

3 8417

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Un-Answered Questions { Core Java }

What is the functionability stubs and skeletons?

1098

Why string is called as immutable?

887

What is difference between c++ and java ?

1072

Define "Access specifiers" in java.

1121

How to display all the prime numbers between 1 and 100

940

What is the difference between array and array list in java?

1139

Does java runtime require a license?

979

What does 0 mean in boolean?

928

Does java trim remove newline?

923

What is scope of a variable?

1036

What is the difference between the font and fontmetrics classes in java programming?

1024

What is anagram of a string?

886

What is java ceil?

980

enlist some features of jdk.

907

What is scanner in java?

905

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