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 31771

How to call static method?

Epoch,

4 7127

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

Sai Softech,

8 25893

Difference between abstract class and Interfaces?

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

7 14119

what is the use of declaring constructor as private?

Cyient, IVY Technologies, Sai Softech, Virtusa,

5 12879

Difference between array and arraylist.

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

23 149557

Difference between Hash Table and Hash Map?

Persistent,

10 19479

Features of Java?

4 5354

Difference between overloading and overridding?

4 7223

Keywords in Exceptions?

2 4467

write the hierarchy of component class?

1 3476

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

IBM,

14 46305

what is the difference between multitasking and multithreading?

TCS,

21 75360

why java is not supporting multiple inheritence?

3 5204

what are the diffrences between interface and abstract class?

4 6253

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Un-Answered Questions { Core Java }

Why java is platform independent? Explain.

592

Are variables stored in ram?

545

Can we use String with switch case?

654

What is synchronization and why is it important in java programming?

463

Why is java logo a cup of coffee?

614

Can you instantiate the math class?

592

Explain constructors and types of constructors in java.

635

What is the difference between a window and a frame in java programming?

584

Does java allow default arguments?

586

Why a dead thread occurs?

566

Is it possible to compare various strings with the help of == operator?

537

How many arguments can be passed to main ()?

518

What is passed by reference and pass by value ?

574

Given a singly linked list, find the middle of the list in a single traversal without using temporary variable.

604

How to create a base64 decoder in java8?

547

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