1. Which of these method of class String is used to remove leading and trailing whitespaces?

2. What is the process of defining two or more methods within same class that have same name but different parameters declaration?

3. Which of these can be used to differentiate two or more methods having the same name?

4. Find the output of the following code.

        class ternary_operator 

        {

            public static void main(String args[]) 

            {        

                 int x = 3;

                 int y = ~ x;

                 int z;

                 z = x > y ? x : y;

                 System.out.print(z);

            } 

        }

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

6. Which of these data types is used to store command line arguments?

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

8. What is the default value of String variable?

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

        class String_demo 

        {

            public static void main(String args[])

            {

                int ascii[] = { 65, 66, 67, 68};

                String s = new String(ascii, 1, 3);

                System.out.println(s);

            }

       }

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

11. 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();     

            }

       }

12. How is Date stored in database?

13. 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);

        }

    }

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. 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 */ 
     }
   }