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 14403

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

3 5239

why java main method is given as static method?

2 4299

what is Abstract DataType?

1 3421

why operator overloading is removed in java?

1 4072

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

2 4393

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

Vimukti Technologies,

3 7114

please write java program of instanceOf keyword implementation

TCS,

2 4881

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

1810

How to extract HashMap values?

Marlabs,

5 11626

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

Amdocs,

2 6772

Difference between hashCode() & equals()?

HCL,

3 8121

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

1 3618

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

HCL,

2134

Definition for connection pooling?

3 5131

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Un-Answered Questions { Core Java }

How many bytes is a unicode character?

963

Is list ordered in java?

930

Is empty list java?

881

Which is better 64 bit or 32 bit?

884

What is this keyword in java?

990

State differences between C and Java?

1155

Can we declare an array without size in java?

929

Why string is not a wrapper class?

1144

What is default switch case? Give example.

963

what do you mean by classloader in java?

979

In a class implementing an interface, can we change the value of any variable defined in the interface?

1034

why are wait(), notify() and notifyall() methods defined in the object class? : Java thread

943

Can a java program have 2 main methods?

1004

What is xslt in java?

941

Can the interface be final?

971

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