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 7595

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 5787

Difference between Primary key and unique key?

4 6627

What is the difference between method and constructor ?

3 5804

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

TCS,

3 7488

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

BitWise, HDFC, TCS,

3 16673

what are the rules to use try catch finally?

Satyam, UJ,

1 5521

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

3 5728

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

1 3843

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

IBM, Infosys,

5 19540

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 8870

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 3643

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Un-Answered Questions { Core Java }

What is the size of integer?

1094

Why is singleton class used?

1036

What is math exp in java?

1048

Which class cannot be a subclass in java?

1023

What is meant by 'bit masking' in java?

1188

What are the ways in which a thread can enter the waiting state?

944

What is comparator in java?

1000

What class allows you to read objects directly from a stream in java programming?

1076

We are seeing so many videos/audios as many web sited. But question is these videos or audios are stored in Databases ( Oracle, Mysql, Sybase,... ) or stored any file directory from there they will give the link for that? Pls explain and give sample code to achieve this one? Thanks, Seenu.

1939

Are maps ordered java?

961

What are synchronized blocks in java?

1181

What is the difference between inner class and nested class?

1091

What is size of int in java?

1062

What was java originally called?

956

What is object-oriented programming?

1123

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