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 9520

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"); } }

2460

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

TCS,

15 40791

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 7482

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 21065

How to declare unique ArrayList ?

RMSI,

6 18711

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 6288

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 14210

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

Amazon,

1 9955

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Un-Answered Questions { Core Java }

How many times finalize method will be invoked? Who invokes finalize() method in java?

1075

How destructors are defined in java?

1245

What are the escape sequences in java?

1077

What means public static?

1095

How to print nodes of a Binary tree?

2310

What is nested top-level class?

1099

Can we override protected method in java?

1116

how would you implement a thread pool? : Java thread

971

What are some characteristics of interference class?

1064

What is procedure overloading?

2378

How a string is stored in memory?

1090

What is a boolean structure?

1137

How many decimal places is a double?

1041

What is java developer skills?

1029

What is use of map in java?

1062

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