Question One

 

(a)How many times does the code snippet given below display "Hello"?

 

int x = 1;

while (x != 15)

{

  System.out.println ("Hello");

  x++;

}

 

 

 

 

 

(b)What is the output of the following code fragment?

 

int i = 1;

int sum = 0;

while (i <= 5)

{

  sum = sum + i;

  i++;

}

System.out.println("The value of sum is " + sum);

 

 

 

1 Marks 




Question Two

a.        What is the output of the following snipped code?

public class Test {

  public static void main(String args[]) {

     int x = 45;

     int y = 10;

     if( x == 30 ) {

        if( y == 10 ) {

           System.out.print("X = 30 and Y = 10");

        else

           System.out.print("X = 45 and Y = 10");

        }

      }

      System.out.print("Nested If");

  }

}

 

 

 

 

 

 

 

 

b.        If the user enter 2000, what is the output of the code segment shown below?

public class Leapyear{

  public static void main(String[] args)  {

     int year;   

     Scanner console = new Scanner(System.in);

     System.out.print("Enter a year : ");

     year = console.nextInt();

     if (year % 4 == 0)     {

        if (year % 100 == 0) {

           if (year % 400 == 0) {

              System.out.println("A leap year");

           }

           else           {

              System.out.println("Not a leap year");

           }

        }

        else        {

           System.out.println("A leap year");

        }

     }

     else     {

        System.out.println("Not a leap year");

     }  } }

 

 

 

0.5 Marks 




Question Three

What is the output of:

 

for (int i=1; i <= 5; i++)

             {

                     for (int j=1; j <= 5; j++)

                            System.out.print (i*j + " ");

                     System.out.println();

             }

 

 

 

 

 

 

 

1.5 Marks 




Question Four

Write a program that asks the user to enter a number between 1 and 10 then prints the related multiplication table. The program must ask the user if he wants to continue by choosing another number or quit.

NB: you have to run your program then join a screenshot of the execution to your answer file

Typical run of the program:

Give your proposed number between 1 and 10: 4

The Multiplication Table of 4 is

1 * 4 = 4

2 * 4 = 8

3 * 4 = 12

4 * 4 = 16

5 * 4 = 20

6 * 4 = 24

7 * 4 = 28

8 * 4 = 32

9 * 4 = 36

10 * 4 = 40

Do you want to continue Y/N? Y

Give your proposed number between 1 and 10: 7

The Multiplication Table of 7 is

1 * 7 = 7

2 * 7 = 14

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