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Core Java Interview Questions
Questions Answers Views Company eMail

Can a class extend abstract class or interface? why

Wipro,

4 8815

What is the difference between Access Modifier and Access specifier?

 1 6555

Is it possible to write method inside method

L&T,

4 10861

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

 4 6554

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 28894

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

Amazon,

2177

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 6119

what is the logic inside any default constuctor?

 2 3849

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 13828

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

L&T, Wipro,

6 9717

difference between arraylist and linkedlist otherthan performance

L&T,

2 9936

why pointer is not used in java?

 3 10979

what are the difference between Java and .Net?

 5 7477

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

Accel,

2024

What is map and hashmap? also tell the difference.

 1 3912

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Un-Answered Questions { Core Java }

What is the purpose of static methods and variables?

730

What is return type in java?

802

Why is the singleton pattern considered to be an anti pattern?

654

Convert Binary tree to linked list.

800

Can we define constructor in inner class?

732

What is preflight request?

704

What does jre stand for?

789

What is a conditional statement explain with example?

739

What state does a thread enter when it terminates its processing in java programming?

771

What are keywords and reserved words in java?

765

What is difference between array and vector?

758

What does @param args mean in java?

788

What is the main functionality of the remote reference layer?

1620

How do you remove an element from an arraylist in java?

645

What are the procedures?

808

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