CSCI 1300 Quiz: 30 Jan 2007

Special Weird Instructions:
On any question, you may write the word UNCERTAIN 
beside your answer.  
For any UNCERTAIN answer you will receive:
  30% credit even if you are wrong!
  But only 90% credit if you are right!

1. Suppose we have these three integer variables:
   int i, j, k;
   ...
   Write a single Boolean expression that is true
   when the values of i, j, and k are in order from
   smallest to largest (i is smallest, j is in the
   middle, k is largest).

(i < j < k) INCORRECT!!!

Correct answers (w or w/o parentheses)
((i < j) && (j < k))
or
((i <= j) && (j <= k))


2. Suppose that we have four boolean variables:
   bool a = true, b = true, y = false, z = false;
   What are the values of these expressions:
   A. (a && b) true and true = true
   B. (a && z) true and false = false
   C. (z && y) false and false = false
   D. (a || b) true or true = true
   E. (a || z) true or false = true
   F. (z || y) false or false = false
   G. (!a || z) not true or false = false or false = false

!(a && b) = not (true and true) = not true = false
!z = not false = true