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

Core Java Interview Questions

Questions Answers Views Company eMail

In method overloading ,if i change the return type to Long instead of INT,is the program execute

HCL,

6 11531

wat is class level lock and object level lock

HCL, Persistent,

3 22094

is it possible to add a object in a HASHMAP

HCL,

6 9575

why we cannot declare static variable inside a static method

4 9668

why using interface interface ?

1982

why use interface? if interface declear a method implement in class. why direct implement method in class

HCL,

1 2717

different between exception and error? explaim check and uncheck exception

4 7264

Difference between interface and abstract class with ex.

Cognizant, Tech Mahindra,

4 9458

what is Thread priority?

Tech Mahindra, Wipro,

4 7917

Distinguish method overloading and overriding

Tech Mahindra,

2 5580

Distinguish method overloading and method overriding

Tech Mahindra,

4 7223

What is thread priority?

Tech Mahindra,

1 5680

Why Over riding is Run Time Polymorphism?

Genpact,

3 15870

How many objects are created when we create String class object using new operator?

Mind Tree,

9 27253

What is onClassLoader in java?

Cap Gemini,

5 9644

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Un-Answered Questions { Core Java }

What is linkedlist in java?

940

Difference between string s= new string (); and string s = "abv";?

1164

Explain the importance of import keyword in java?

961

What is final modifier?

995

How does arrays sort work in java?

971

What is the difference between the direct buffer and non-direct buffer in java?

987

Which sorting algorithm is best in java?

945

Why do we need array in java?

963

What is the basic of java?

978

Is age discrete or continuous?

1072

What is nan in java?

949

How many ways can an argument be passed to a subroutine and explain them?

973

Do you need to import math in java?

945

When do we need to use internal iteration? When do we need to use external iteration?

1071

What is exception handling in java?

989

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