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 6458

How can be define MARKER interfce in java

1 6393

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

4 9213

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"); } }

2350

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

TCS,

15 39952

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 16578

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

Yash Technologies,

1 7338

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

2053

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

HP,

6 20695

How to declare unique ArrayList ?

RMSI,

6 18295

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

1 4737

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 6064

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

2 5951

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

3 13962

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

Amazon,

1 9814

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Un-Answered Questions { Core Java }

What is method in java with example?

913

I am a fresher and know core java, c languge, html, css etc if I am illegible for any job then send it on my email tatranakshay276@gmail.com

1655

Why does the integer quotient -0/3 yield 0, but the double quotient -0.0/3.0 yields – 0.0?

1000

Can a hashset contain duplicates java?

936

Explain the importance of join() method in thread class?

1073

What is the difference between final, finally and finalize()?

1080

What is the advantage of functional interface in java 8?

960

What is wrapper class example?

953

What are selection structures?

952

What is the synonym of framework?

957

What is the difference between preparedstatement and statement in java?

1076

What is variable declaration and definition?

974

What is the collection interface?

987

What is preparedstatement in java?

1006

what is session in java?

1199

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