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 6641

How can be define MARKER interfce in java

1 6530

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

4 9523

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"); } }

2461

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

TCS,

15 40792

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 16818

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

Yash Technologies,

1 7483

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

2159

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

HP,

6 21067

How to declare unique ArrayList ?

RMSI,

6 18715

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

1 4916

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 6290

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

2 6156

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

3 14214

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

Amazon,

1 9955

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Un-Answered Questions { Core Java }

What are the differences between abstract class and interface?

1171

Explain yield() method in thread class ?

1120

What are the differences between checked exception and unchecked exception?

1021

How to make a non daemon thread as daemon?

1119

What is ascii code?

1378

How do you check if a string is lexicographically in java?

1001

Tell me a few examples of final classes defined in Java API?

1167

What does n mean in java?

1028

What is sorting in java?

1037

How do you convert string to int in java?

1150

What is the difference between the boolean & operator and the && operator in java programming?

1099

Is java a prime method?

1044

Is java a super set of javascript?

1159

Can a lock be acquired on a class in java programming?

1051

Can you give few examples of final classes defined in java api?

1057

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