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 6537

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"); } }

2389

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

TCS,

15 40357

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 20859

How to declare unique ArrayList ?

RMSI,

6 18486

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 6054

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 }

How do you empty a list in java?

975

What is the static method?

1076

Does unicode support all languages?

1032

What is java lang string?

983

How to create an interface?

1085

What is the return type of the main method?

1040

What is java ceil?

1033

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

1133

Can we call a non-static method from inside a static method?

998

Does java have a compiler?

1040

Is upper case in java?

960

Why we use set in java?

1001

What is regex java?

1106

What is bubble sort in java?

1055

Explain about serializable interface in java?

1001

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