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 is for datainputstream?

1 4042

What is the use of static keyword in "public static void main()"

College School Exams Tests, Infosys, Six Dee Telecom,

10 12945

what is mena by object block any what is the use of that

CGI,

2214

can any body tell me? does advance java and j2ee both are same.

CTS, Infosys,

4 10360

does core java and j2se both are same?

5 14860

what is difference between signed & unsigned char?

2 5009

What is the blank final variable?

3 6513

difference throws and throw in java

3 5224

What is “try and catch” in java

2 4771

Integer.parse Int(bf.readLine(System.out.println("enter value for n["+m+"]:"))); can it run under this

1 3064

what is mean by ooad? where we are using? can you tell me any real time example?

Eka Software,

1 3895

What is mean by UML? what is the use? where we are using?

Eka Software,

1 4551

Any one can explain how the inerface uses in java. give with example.

IBM,

1 2933

interface X{ void m1(); void m2(); } class Child2 extends Object implements X { public void m1(){ System.out.println("Child2 M1"); } public void m2(){ System.out.println("Child2 M2"); } } public class ParentChildInfterfaceDemo { public static void main(String[] args){ X x = new Child2(); X x1 = new Child2(); x.m1(); x.m2(); x.equals(x1); } } Will the above code work? If yes? Can you please explain why the code x.equals(x1) will work as the equals method is called on interface reference vaiable?

2 5764

how can you say that java is independ language

TCS, Wipro,

2 5727

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Un-Answered Questions { Core Java }

What is function and method in java?

951

What is static variable with example?

1011

What is parsing and its types?

1109

What is substring in java?

1224

What is the definition of tree ?

1038

What is an association?

985

What is java in layman terms?

1012

What is the difference between error and an exception?

1155

What about main thread in java?

1121

Is it possible to write a regular expression to check if string is a number?

1028

What does nextint () do in java?

981

What are the different ways of implementing thread? Which one is more advantageous?

985

What's the base class of all exception classes?

1061

Give an example of use of pointers in java class.

1031

What is a key in java?

979

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