28/01/25
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Q)What is the syntax to create a child class(sub class) in Java?
class   <sub class name>    extends    <super class name>{
}
For eg.

class Car  extends  Vehicle{
}//sub class

DIAGRAM

Q)How to create is-a relationship between two classes in Java?
=>by using the keyword "extends".
Q)What is the output of the following program?
class Vehicle{
      void move(){
           System.out.println("Vehicle is moving");
      }
}
class Car{
}
class InheritanceApplication{
     public static void main(String args[]) {
         Car c=new Car();
	 c.move();
     }
}
Ans:- The above program causes compilation error.
          Reason:- move() method is not defined in Car class. Nor
	  it is made the child of Vehicle class.

Q)What is the output of the following program?
//InheritanceApplication.java
class Vehicle{
      void move() {
           System.out.println("Vehicle is moving");
      }
}//super class
class Car extends Vehicle{
}//sub class
class InheritanceApplication{
     public static void main(String args[]) {
         Car c=new Car();
	 c.move();
     }
}
Ans:- Vehicle is moving