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 11754

wat is class level lock and object level lock

HCL, Persistent,

3 22239

is it possible to add a object in a HASHMAP

HCL,

6 9797

why we cannot declare static variable inside a static method

4 9829

why using interface interface ?

2046

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

HCL,

1 2808

different between exception and error? explaim check and uncheck exception

4 7423

Difference between interface and abstract class with ex.

Cognizant, Tech Mahindra,

4 9618

what is Thread priority?

Tech Mahindra, Wipro,

4 8077

Distinguish method overloading and overriding

Tech Mahindra,

2 5704

Distinguish method overloading and method overriding

Tech Mahindra,

4 7405

What is thread priority?

Tech Mahindra,

1 5763

Why Over riding is Run Time Polymorphism?

Genpact,

3 16029

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

Mind Tree,

9 27572

What is onClassLoader in java?

Cap Gemini,

5 9862

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Un-Answered Questions { Core Java }

How long will it take to learn java?

992

What is difference between calling start() and run() method of thread?

1132

What are dot operator queries?

1105

What is the difference between the paint() and repaint() methods?

1062

What are examples of modifiers?

1128

What comes to mind when someone mentions a shallow copy in java?

1110

Define locale.

1038

Is empty string in java?

1180

What is numeric data type?

989

What is the purpose of static methods and variables?

1044

Outline the major features of java.

1078

Explain method local inner classes ?

1036

What is jvm? Why is java called the platform independent programming language?

1023

Where we write javascript code in html page?

1059

Is there any difference between nested classes and inner classes?

1098

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