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 12951

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

CGI,

2216

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

CTS, Infosys,

4 10362

does core java and j2se both are same?

5 14862

what is difference between signed & unsigned char?

2 5012

What is the blank final variable?

3 6514

difference throws and throw in java

3 5230

What is “try and catch” in java

2 4773

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

1 3068

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

Eka Software,

1 3896

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

Eka Software,

1 4553

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

IBM,

1 2934

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 5765

how can you say that java is independ language

TCS, Wipro,

2 5730

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Un-Answered Questions { Core Java }

Why java is secure? Explain.

1047

Why is flag used in java?

1076

What is jee6?

1108

Is a class an object?

1007

What is the purpose of the enableevents() method?

1047

Why do we use return statement?

1042

What are methods of a class?

1036

Can we have two methods in a class with the same name?

1053

What does .equals do in java?

1099

What is tcp ip in java?

1118

What is a singleton in genetics?

1071

What is a line break example?

1001

What happens if an exception is throws from an object's destructor?

1048

What is ctrl m character?

1059

What are different ways of object creation in java ?

1078

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