1. 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 */ 
     }
   }

2. 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++;

                }

            } 

        }

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

        class recursion 

        {

            int func (int n) 

            {

                int result;

                result = func (n - 1);

                return result;

            }

        } 

        class Output 

        {

            public static void main(String args[]) 

            {

                recursion obj = new recursion() ;

                System.out.print(obj.func(12));

            }

        }

4. Which of these is correct about passing an argument by call-by-value process?

5. What will be the output of the following Java code snippet?

    class abc

    {

        public static void main(String args[])

        {

            if(args.length>0)

            System.out.println(args.length);

        }

    }

6. A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?

7. Which of the following is not an OOPS concept in Java?

8. Which of these keywords are used for the block to be examined for exceptions?

9. What is true about final class?

10. Which of these is an incorrect array declaration?

11. 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);     

            }

       }

12. How to format date from one form to another?

13. Which environment variable is used to set the java path?

14. Find the output of the following code.

        class bool_operator 

        {

            public static void main(String args[]) 

            {    

                 boolean a = true;

                 boolean b = !true;

                 boolean c = a | b;

     	     boolean d = a & b;

                 boolean e = d ? b : c;

                 System.out.println(d + " " + e);

            } 

        }

15. Which of these jump statements can skip processing the remainder of the code in its body for a particular iteration?