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 3959

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

College School Exams Tests, Infosys, Six Dee Telecom,

10 12587

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

CGI,

2167

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

CTS, Infosys,

4 10198

does core java and j2se both are same?

5 14669

what is difference between signed & unsigned char?

2 4903

What is the blank final variable?

3 6374

difference throws and throw in java

3 5102

What is “try and catch” in java

2 4645

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

1 2991

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

Eka Software,

1 3800

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

Eka Software,

1 4451

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

IBM,

1 2840

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 5673

how can you say that java is independ language

TCS, Wipro,

2 5624

Post New Core Java Questions

Un-Answered Questions { Core Java }

How hashmap increases its size in java?

937

What do you mean by local class?

962

What is an class?

978

Describe the process as to how substring() methodology mechanisms in java.

1058

What is nextint java?

988

How use .contains in java?

1133

What is the role of garbage collector in java?

911

Can a class have 2 constructors?

853

What is the importance of static variable?

1067

I want to persist data of objects for later use. What is the best approach to do so?

1009

What is array pointers ?

990

Can each java object keep track of all the threads that want to exclusively access it?

913

What is the purpose of assert keyword used in jdk1.4.x?

1016

What is a static class in java?

968

What is final keyword?

1099

For More Un-Answered { Core Java } Questions Click Here