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

Core Java Interview Questions

Questions Answers Views Company eMail

what do you meant by Runtime Polymorphism?

BVIMR, IBM, Persistent,

13 35453

How to call static method?

Epoch,

4 8605

Difference between ?System.out.println? and ?System.error.println??

Sai Softech,

8 28265

Difference between abstract class and Interfaces?

CTS, iFlex, PA Consulting, Sai Softech, Value Chain,

7 16352

what is the use of declaring constructor as private?

Cyient, IVY Technologies, Sai Softech, Virtusa,

5 14866

Difference between array and arraylist.

Arise Solution, Banca Sella, iFocus, NIC, Sai Softech, Solartis, TCS, Verizon,

23 155911

Difference between Hash Table and Hash Map?

Persistent,

10 22441

Features of Java?

4 7079

Difference between overloading and overridding?

4 8722

Keywords in Exceptions?

2 5209

write the hierarchy of component class?

1 4146

what are the differences between final,finally,finalize methods?

IBM,

14 50219

what is the difference between multitasking and multithreading?

TCS,

21 80778

why java is not supporting multiple inheritence?

3 6271

what are the diffrences between interface and abstract class?

4 7722

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Un-Answered Questions { Core Java }

What are use cases?

915

What is final class?

969

What is join () in java?

926

Can you sort a string in java?

861

Explain list interface?

920

Difference between concurrent hashmap and hashtable and collections

1011

What are some examples of variable costs?

900

What is string builder in java?

961

What is static in java?

1040

Write a program to calculate factorial in java?

963

What is the difference between yielding and sleeping?

1048

Can a class be declared as static?

1120

What is the difference between import java.util.date and java .util?

1012

Does list maintain insertion order java?

865

How to sort an array from smallest to largest java?

953

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