NPTEL PROGRAMMING IN JAVA WEEK 3 ANSWERS (JUL-DEC 2020)

QUESTION 1:

if (n<=1) 

            return (1-n); 

        return fib(n - 1) + fib(n - 2); 

QUESTION 2:

class Point{

   double x,y;

  

   public double distance(Point p1, Point p2)

                {

                  

                  double root=(p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y);

                  root=Math.sqrt(root);

                  System.out.print(root);

                  return root;

                }

}

QUESTION 3:

//Create a derived class constructor which can call the one parametrized constructor of the base class

double height;

Test1(double l, double h){

  super(l);

  this.length=l;

  this.height=h;

}

//Create a derived class constructor which can call the two parametrized constructor of the base class

Test1(double l, double b, double h){

  super(l,b);

  this.length=l;

  this.breadth=b;

  this.height=h;

}

  

  

//Override the method calculate() in the derived class to find the volume of a shape instead of finding the area of a shape

double calculate(){

  

  return length*breadth*height;}

QUESTION 4:

QuestionScope a= new QuestionScope();

System.out.println(a.sum(n1,n2));

System.out.print(QuestionScope.multiply(n1,n2));

QUESTION 5:

static void swap(Question obj)

        {

          int temp;

          temp=obj.e1;

          obj.e1=obj.e2;

          obj.e2=temp;

        }