CH-4 Making Decisions – Programming Logic and Design : Exam Guide

Chapter 4: Making Decisions
TRUE/FALSE
1. Every decision you make in a computer program involves evaluating a Boolean
expression.
Answer: True
2. In any Boolean expression, the two values compared can be either variables or constants.
Answer: True
3. Any decision can be made using combinations of just two types of comparisons: equal and
not equal.
Answer: False
4. Most programming languages allow you to ask two or more questions in a single
comparison.
Answer: True
5. A short-circuit evaluation is where each part of an expression is evaluated only as far as
necessary to determine whether the entire expression is true or false.
Answer: True
6. When you need to satisfy two or more criteria to initiate an event in a program, you must
make sure that the second decision is made entirely independently of the first decision.
Answer: False
7. Besides AND and OR operators, most languages support a NOT operator.
Answer: True
8. Most programming languages limit the number of AND and OR operators in an
expression.
Answer: False
9. When you combine AND and OR operators, the OR operators take precedence, meaning
their Boolean values are evaluated first.
Answer: False
10. You can use parentheses to override the default order of operations.
Answer: True
MULTIPLE CHOICE
1. A selection with an action that is associated with each of two possible outcomes is known
as a(n) ____ selection.
a. unary

b. binary
c. octal
d. semiconductor
Answer: B
2. The keyword that is NOT included in a single-alternative selection is ____.
a. if
b. then
c. else
d. endif
Answer: C
3. Boolean expressions are named after ____.
a. Harold Boolean
b. Henry Boole
c. George Boole
d. Gerhardt Boolean
Answer: C
4. ____ operators require two operands.
a. Unary
b. Tertiary
c. Binary
d. Double
Answer: C
5. The ____ sign means “greater than.”
a. , =,