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 are the major differences between jdk1.4 and jdk1.5?

Cap Gemini, Crimson Logic, Infosys, TCS, Tenth Planet,

2 14575

In treeset we add same object ...what will be the out put

3 5373

why java main method is given as static method?

2 4423

what is Abstract DataType?

1 3498

why operator overloading is removed in java?

1 4149

wat is final...? wat is finally...? wat is finalize....? difference between " final and finally and finalize "...?

2 4515

can we override the main() method in java????

Vimukti Technologies,

3 7262

please write java program of instanceOf keyword implementation

TCS,

2 5003

Hi i am creating desktop application in that i want calling to mobile number. i have java telephone api (JTAPI) but i dont understand how it configure & use plese help me

1853

How to extract HashMap values?

Marlabs,

5 11848

How to Create A Wapper Class in core Java and Why are Use in java?

Amdocs,

2 6930

Difference between hashCode() & equals()?

HCL,

3 8288

What is the reason that multiple inheritance is not possible in java??

1 3700

Why are the destructors for base class and derived class called in reverse order when the program exits

HCL,

2212

Definition for connection pooling?

3 5257

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Un-Answered Questions { Core Java }

Why is serialization required?

963

Define inheritance with reference to java.

1096

Explain where variables are created in memory?

1014

How to obtain a performance profile of java program

1034

What is the difference between error and an exception?

1157

What is the use of parse function in java?

986

Can I uninstall java?

1056

What is the parse method in java?

1126

Define an applet in java?

1166

Why are global variables used?

1022

Explain the difference between protected and default access.

1001

What is the purpose of object oriented programming?

981

What are green threads in java?

1005

How does split work in java?

1055

What is the difference between a method and a procedure?

1066

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