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 8461

What is the difference between Access Modifier and Access specifier?

1 6339

Is it possible to write method inside method

L&T,

4 10356

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

4 6167

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 28092

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

Amazon,

2057

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 5738

what is the logic inside any default constuctor?

2 3615

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 13399

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

L&T, Wipro,

6 9264

difference between arraylist and linkedlist otherthan performance

L&T,

2 9579

why pointer is not used in java?

3 10630

what are the difference between Java and .Net?

5 6994

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

Accel,

1891

What is map and hashmap? also tell the difference.

1 3685

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Un-Answered Questions { Core Java }

which is advanced deep technology in java launched by the sun microsystem??? The answer is very logical If u need correct answer mail me at priya_gupta@gmail.com

3253

Is there a way to increase the size of an array after its declaration?

665

Differentiate between a constructor and a method? Can we mark constructors final?

759

What is adapter in java?

584

Name the components that are termed to be Heavy-weight component but available in Light-weight components?

2051

how to one war file class to another war file class?

1622

What are the different types of constructor?

582

what is mutual exclusion? How can you take care of mutual exclusion using java threads? : Java thread

747

Explain when classnotfoundexception will be raised ?

628

What is the difference between super class & sub class?

650

What do bitwise operators do?

596

What is the difference between call by reference and call by pointer?

571

What is the use of object and class classes?

640

Can we override data members in java?

696

What is the java virtual machine?

676

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