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 36549

How to call static method?

Epoch,

4 9044

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

Sai Softech,

8 28795

Difference between abstract class and Interfaces?

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

7 16878

what is the use of declaring constructor as private?

Cyient, IVY Technologies, Sai Softech, Virtusa,

5 15345

Difference between array and arraylist.

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

23 157704

Difference between Hash Table and Hash Map?

Persistent,

10 23152

Features of Java?

4 7407

Difference between overloading and overridding?

4 9127

Keywords in Exceptions?

2 5427

write the hierarchy of component class?

1 4296

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

IBM,

14 51234

what is the difference between multitasking and multithreading?

TCS,

21 82252

why java is not supporting multiple inheritence?

3 6553

what are the diffrences between interface and abstract class?

4 8053

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Un-Answered Questions { Core Java }

What do you mean by mnemonics?

1124

What is size () in java?

1158

What is the difference between the final method and abstract method?

1124

Difference between overriding and overloading in java?

1122

What is static block?

1208

what is meant by HQL?

1125

What are the 2 types of java programs?

1166

Is zero a natural number?

1116

Can java inner class be static?

1081

Difference between Linked list and Queue?

1096

Is there a way to increase the size of an array after its declaration?

1102

Can java hashmap have duplicate keys?

1091

Is java an ide?

1036

What is the benefit of abstract class?

1006

Which java collection does not allow null?

1219

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