CS 0007 - Practice Midterm

1.) Write a for loop that iterates 100 times.

2.)  What does this code display on the screen if run?

int q = 5;

     int r;

     int s;

     r = q++;

     s = ++q;

     q *= r + s;

     q %= 10;

     System.out.println(“q is ” + q);

     System.out.println(“r is ” + r);

     System.out.println(“s is ” + s);

3.) What is an algorithm and why is it important in Computer Science?

4.) What is a comment?  How do you specify a line comment? A block comment? Describe when you should use a comment.

5.) In the following code, what is displayed if the user enters the number 3?

import tio.*

class Test {

     int input = Console.in.readInt();

     int output = 1;

     switch(input) {

          case 2:

              output = 3;

              break;

          case 3:

              output = 4;

          case 4:

              output = input + 5;

          case 5:

              output = output  + 1;

              break;

          default:

              System.out.println(“Input unknown”);

     }

     System.out.println(“The output is ” + output);

}

6.) What is the most appropriate data type to represent the following quantities?

            a) Your grade point average

            b) How many students go to Pitt

            c) Your middle initial

            d) A city name

            e) Pi (p)

7.)  Write a program to display a 5 x 5 multiplication table like so:

1          2          3          4          5

2          4          6          8          10

3          6          9          12        15

4          8          12        16        20

5          10        15        20        25