Sample Exam 1 questions

Sample true/false questions

1. public is a reserved word in Java.

2. The following prints the numbers 2 through 5 (including 2 and 5)

       for (int i=2; i<5; i++) {
          System.out.println (i);
       }
       

Sample multiple-choice questions

1. How many compiler errors does the following have?

     public class ForLoopPrint {
         public static void main (String[] argv)
         {
             for (i=0; i<5 i++) {
                 System.out.println (i)
             }
         }
     }
     

2. What is the output of this program? (Only the code inside main is shown.)

           int a=1, b=2, c=3; 
           for (int i=0; i<5; i++) {
               c = a + b;
               b = c;
           }
           System.out.println (c);
     

Sample programming problems

1. Write a program to add up the negative and only the negative elements of an array. Thus, the output for this array

     int[] A = {1, -2, 3, 4, -5, 6, -7};
     

   should be -14.

2. Write a program that, given an array of elements such as

     int[] A = {1, 2, 3, 4};
     

   prints out all possible pairs of elements, with each pair on one line, and where each element in a pair must be different. We'll count the pair 1,2 the same as the pair 2,1. Thus the output for the above will be:

      1  2
      1  3
      1  4
      2  3
      2  4
      3  4