CS 1401, Quiz 5
Date: Wednesday, October 11, 2006
Name (please type legibly, ideally in block letters):
1. Draw the truth tables for "and", "or", and "not" operations. Use
these truth tables to find the truth value of the statement
3 < 5 && 1 < 4 || 4 < 1.
Explain precedence of different logical operations,
and how this precedence is related to precedence of different arithmetic
For extra credit: what is the difference between && and &?
What is the advantage of each of these operations? Give an example
when they lead to different results.
Turn over, please.
2. Use the while loop to write a piece of code that, given an integer n,
finds the smallest
natural number k for which k^3 > n. In other words, your code should
find the smallest cube
which is larger than a given integer n. For example, for n = 7,
we should return 2, because 2^3 = 8 > 7, and 2 is the
smallest such power: 1^3 = 1 < 7. Trace your code step-by-step for n = 7.
Idea: start with k = 0,
and while the condition k^3 > n is not satisfied, keep increasing k by 1.
Reminder: to compute the power a^b in Java, you
can use the
For extra credit: when you want to increase k by 1,
what is the advantage of using k++ or ++k instead of
k = k+1?