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 3958

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

College School Exams Tests, Infosys, Six Dee Telecom,

10 12585

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 10197

does core java and j2se both are same?

5 14668

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 4644

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 5672

how can you say that java is independ language

TCS, Wipro,

2 5624

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Un-Answered Questions { Core Java }

What is the use of default method in interface in java? Explain

940

Are arrays immutable in java?

1020

What is an empty string in css?

987

What is abstraction in java?

1028

Can a static class have a constructor java?

942

What are the advantages of defining packages in java?

930

What does g mean in regex?

945

What are assembly attributes?

956

What is the difference between jdk and jre?

1012

What function extracts specified characters from a string?

965

How to perform selection sort in java?

963

What are the advantages of exception handling?

1016

Can we convert list to set in java?

926

Can we call thread start () twice?

917

What do you mean by of string::valueof expression in java 8?

912

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