1. Find the value of A[1] after execution of the following program.

int[] A = {0,2,4,1,3};
for(int i = 0; i < a.length; i++){
    a[i] = a[(a[i] + 3) % a.length];
}

2. What is the process of defining a method in terms of itself, that is a method that calls itself?

3. Which two classes use the Shape class correctly?

A. public class Circle implements Shape 
   {
    private int radius;
   }
B. public abstract class Circle extends Shape 
   {
    private int radius;
   }
C. public class Circle extends Shape 
   {
   private int radius;
   public void draw();
   }
D. public abstract class Circle implements Shape 
   {
    private int radius;
    public void draw();
   }
E. public class Circle extends Shape 
   {
    private int radius;
    public void draw()
    {
     /* code here */
    }
   }
F. public abstract class Circle implements Shape 
   {
     private int radius;
     public void draw() 
     { 
      /* code here */ 
     }
   }

4. Find the output of the following code.

       class overload 

       {

            int x;

     	double y;

            void add(int a , int b) 

            {

                x = a + b;

            }

            void add(double c , double d)

            {

                y = c + d;

            }

            overload() 

            {

                this.x = 0;

                this.y = 0;

            }        

        }    

        class Overload_methods 

        {

            public static void main(String args[])

            {

                overload obj = new overload();   

                int a = 2;

                double b = 3.2;

                obj.add(a, a);

                obj.add(b, b);

                System.out.println(obj.x + " " + obj.y);     

            }

       }

5. What will be the output of the following Java program?

        class A 

        {

            int i;

            public void display() 

            {

                System.out.println(i);

            }    

        }    

        class B extends A 

       {

            int j;

            public void display() 

            {

                System.out.println(j);

            } 

        }    

        class Dynamic_dispatch 

       {

            public static void main(String args[])

            {

                B obj2 = new B();

                obj2.i = 1;

                obj2.j = 2;

                A r;

                r = obj2;

                r.display();     

            }

       }

6. Which of these method of Object class can clone an object?

7. What is the syntax for java main method?

8. What will be the output of the following Java program?

        class recursion 

        {

            int fact(int n) 

            {

                int result;

                if (n == 1)

                    return 1;

                result = fact(n - 1) * n;

                return result;

            }

        } 

        class Output 

        {

            public static void main(String args[]) 

            {

                recursion obj = new recursion() ;

                System.out.print(obj.fact(5));

            }

        }

9. What is not the use of “this” keyword in Java?

10. In Iterator, hasMoreElements() method of Enumeration has been changed to:

11. What will be the output of the following Java code?

    class San

    {

     public void m1 (int i,float f)

     {

      System.out.println(" int float method");

     }

     

     public void m1(float f,int i);

      {

      System.out.println("float int method");

      }

     

      public static void main(String[]args)

      {

        San s=new San();

            s.m1(20,20);

      }

    }

12. Find the output of the following code.

        class array_output 

        {

            public static void main(String args[]) 

            {

                int array_variable [] = new int[10];

    	    for (int i = 0; i < 10; ++i) 

                {

                    array_variable[i] = i;

                    System.out.print(array_variable[i] + " ");

                    i++;

                }

            } 

        }

13. Which of these statements are incorrect?

14. What will be the output of the following Java code?

        class A 

        {

            public int i;

            protected int j;

        }    

        class B extends A 

        {

            int j;

            void display() 

            {

                super.j = 3;

                System.out.println(i + " " + j);

            }

        }    

        class Output 

        {

            public static void main(String args[])

            {

                B obj = new B();

                obj.i=1;

                obj.j=2;   

                obj.display();     

            }

       }

15. Identify the output of the following program.

String str = “Hellow”;
System.out.println(str.indexOf(‘t));