Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

If there is no implementation of MARKER INTERFACE in java. Then how compiler come to know about specification.

2 6538

How can be define MARKER interfce in java

1 6460

How two different class threads communicate with each other?. send example code.

4 9359

public class BatchTest { public static void main(String[] args) { Runtime run = Runtime.getRuntime(); try { Process p = run.exec("cmd start /c D:/test.bat"); System.out.println(p.exitValue()); } catch (Exception e) { e.printStackTrace(); } System.out.println("FINISHED"); } }

2390

What is the difference between this() and super()?

TCS,

15 40360

Which of the following can be referenced by a variable? A. The instance variables of a class only B. The methods of a class only C. The instance variables and methods of a class

2 16694

how can u apply shallow cloning and deep cloning to create object?

Yash Technologies,

1 7411

I am unable to find or learn about print command. I have a graphical program in core java in applet but i want to give print command but i have coding for that so if anyone know about this plz mail me on avdhesh_chauhan007@yahoo.co.in

2092

please tell me what is wrapper class in java with example ?

HP,

6 20861

How to declare unique ArrayList ?

RMSI,

6 18487

How to override a equals() method and what is the use?

1 4815

A abstract class extending an abstract class.Super class has both abstract and non-abstract methods.How can we implement abstract and non-abstract mehtods? Explain with snippet

3 6163

what is the difference between java and j2ee... is that can i work j2ee on net beans IDE 6.0

2 6055

what is the difference between AWT and SWING what is the advantage of using swing?

3 14064

Convert a binary search tree to a sorted doubly linked list inplace.

Amazon,

1 9876

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Un-Answered Questions { Core Java }

Is integer passed by reference in java?

1012

Can we clone singleton object?

1064

Which is illegal identifier in java?

1089

What is navigable map in java?

987

Should database connections be singleton?

962

How do you use substring in java?

1138

Explain garbage collection in java?

982

Why call by value prevents parameter value change?

1076

Is null false in java?

1194

Is java based on c?

991

How to perform merge sort in java?

1058

Write a function to print Fibonacci series and Tribonacci series?

1184

What are sets in java?

947

What is a local, member and a class variable?

1038

What is == and === in javascript?

1057

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