JAVA INTERVIEW QUESTIONS

     By,K. Tendul Shiva Kumar,II year IT.

 

1.    What is UNICODE?

 

       A Unicode is used for internal representation of characters

        and strings and it uses 16 bits to represent each other.

 

2.    What is an abstract class?

 

An abstract class designed with implementation gaps for subclasses to fill in and is deliberately incomplete.

 

3.     What is daemon thread? Which method is used to create the daemon thread?

 

Daemon thread is a low priority thread which runs intermittently in the back ground doing the garbage collection operation for the java runtime system. Set Daemon method is used to create a daemon method.

 

4.     What are the wrapper classes?

 

The Wrapper classes are classes that allow primitive types to be accessed as objects.

 

5.     What is the difference between applet and a servlet?

 

Servlets are to servers what applets are to browsers. Applets must have graphical user interfaces (GUI) whereas Servlets have no GUI.

 

6.     What is Java Bean?

 

Java Bean is a software component that has been designed to be reusable in a variety of different environments.