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 4045

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

College School Exams Tests, Infosys, Six Dee Telecom,

10 12958

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 10364

does core java and j2se both are same?

5 14870

what is difference between signed & unsigned char?

2 5019

What is the blank final variable?

3 6514

difference throws and throw in java

3 5236

What is “try and catch” in java

2 4779

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 3899

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

Eka Software,

1 4554

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

IBM,

1 2935

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 5766

how can you say that java is independ language

TCS, Wipro,

2 5732

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Un-Answered Questions { Core Java }

Define nashorn in java8.

1046

Can we overload the constructors?

996

Explain about version control?

1046

What is string array?

1071

Which eclipse is best for java?

1004

What is the difference between the file and randomaccessfile classes?

1100

How do you escape json?

995

What is a protected void?

932

What is the meaning of course?

1100

Give example to differentiate between call by value and call by reference.

1064

What is a variable declaration?

985

What is immutable in java?

1071

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

1060

What is passed by reference and pass by value ?

1032

What is externalizable?

1066

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