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

Core Java Interview Questions

Questions Answers Views Company eMail

Ducking is automatic in checked exception?True or false

2 7593

FOR EXAMPLE WE R HAVING TWO LIST ELEMENTS ..BOTH LISTS CONTAINS ID,NAME,PLACE ..I NEED TO COMPARE BOTH IDS IN TWO LISTS,IF ID'S R SAME MEANS WE HAVE ADD THE DETAILS(LIKE NAME,PLACE) TO MAP...HOW IS POSSIBLE ?CAN ANY ONE SUGGEST?

1 3476

what is difference between Interface and abstract class

GCPL,

2 5380

what are the design patterns in struts?

1 3949

Infinite loop using while ?

4 5785

Difference between Primary key and unique key?

4 6623

What is the difference between method and constructor ?

3 5804

If circular link of two objects, then will it be garbage collected ?

TCS,

3 7487

Why we need Finally with try? pls expain with ur example..

BitWise, HDFC, TCS,

3 16672

what are the rules to use try catch finally?

Satyam, UJ,

1 5520

when there is a need of jvm then how we can say that java is a platform independent language?

3 5725

what should do when using multiple catch() block & what should never do for the same?

1 3841

any other way to print the text without using System.out.println() in java?

IBM, Infosys,

5 19537

what is the difference between applet and swing and gui application in java . What we do with the collections set and list interface

CTS, Phoenix Technologies,

2 8868

Why should we create an object? what is a need of it? Apart from access members of a class i want what is a need of object what does it contain?? In normal class to access any member of thaht class we create object where as for static class we access its members using class name. what is a difference between them... thanks in advance.

1 3641

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Un-Answered Questions { Core Java }

What are the parts of methodology?

974

What is __ init __ functions?

1127

Explain the difference between private, public, package and protected in java?

1044

Is hashmap thread safe?

991

What is the difference between overriding and overloading in OOPS.

1165

Is set sorted in java?

933

What is a function in java?

1031

What is number data type?

1031

What are basic keywords?

1039

In a container there are 5 components. I want to display all the component names, how will you do that?

2190

Can we overload the constructors?

995

What are the types of sockets in java?

1148

Write a program in java to calculate the difference between the sum of the odd level and even level nodes of a binary tree.

1059

When can we say that threads are not lightweight process in java?

1159

Difference between linkedlist and arraylist.

1071

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