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

Core Java Interview Questions

Questions Answers Views Company eMail

Can a class extend abstract class or interface? why

Wipro,

4 9484

What is the difference between Access Modifier and Access specifier?

1 7030

Is it possible to write method inside method

L&T,

4 11753

what is the default value of a variable char?(If not assigned)

4 7213

Write a java program to get a string of words and print the numbers of each word count in descending order

Logica CMG, Subex,

11 30355

Where can I find data structures question and answers with comprehensive working code written in Java

Amazon,

2376

if the memory capacity is 700 presently occupied by process is 690. then another process request space(40) how this situation handled in java.

Wipro,

4 6788

what is the logic inside any default constuctor?

2 4300

How TreeMap sorts the objects inside it?? suppose if have include one employee object and one car object. On what basis it will sort?

5 14456

Java is based on pass by reference or pass by value ..

L&T, Wipro,

6 10674

difference between arraylist and linkedlist otherthan performance

L&T,

2 10545

why pointer is not used in java?

3 11604

what are the difference between Java and .Net?

5 8348

can any body body expalin best definitions & best real time exaples for opps concepts.

Accel,

2224

What is map and hashmap? also tell the difference.

1 4252

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Un-Answered Questions { Core Java }

Why is core java important?

999

What is the difference between an if statement and a switch statement?

1107

Why are getters and setters used?

1008

Can we force garbage collector to run ?

1008

How to instantiate static nested classes in java?

1024

Does sprintf add a null terminator?

1046

What are the kinds of polymorphism?

1050

Can you call a method on a null object?

971

What is the meaning of flag day?

973

What is nextline method in java?

981

What are java packages?

984

Explain about collection interface in java?

941

What is difference between throw and throws ?

1085

Explain the use of sublass in a java program?

983

What is the different between get and post?

911

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