Deck 3: Making Decisions

Question 1

The selection structure can be called an if-then structure.

Answer 1

False

Question 2

All modern programming languages support ____ types of relational comparison operators.

A)two
C)four
B)three
D)six

Answer 2

D

Question 3

In pseudocode, a(n) ____ statement is used to clearly show where the selection structure ends.

A)end
C)endifelse
B)endif
D)stop

Answer 3

B

Question 4

You can ask every programming question by using one of only four types of comparison operators in a Boolean expression.

Question 5

Besides being awkward to use, the "____" comparison operator is the one most likely to be different in various programming languages.

A)equal to
C)not equal to
B)greater than
D)less than

Question 6

A(n) ____ expression is one that represents only one of two states, usually expressed as true or false.

A)alternative
C)Boolean
B)dual
D)double

Question 7

When you combine AND and OR operators within the same statement, the AND operators take precedence.

Question 8

You use the ____ operator to reverse the meaning of a Boolean expression.

A)duplicate
C)logical NOT
B)reverse
D)unequal

Question 9

For greatest program efficiency when using the OR operator, first ask the question that is more likely to be true.

Question 10

In a flowchart or in pseudocode, you can use the symbol that mathematicians use to mean "not equal," which is ____.

A)an equal sign with an octagon over it
C)an equal sign with a slash after it
B)an equal sign with a circle around it
D)an equal sign with a slash through it

Question 11

Computer circuitry consists of two-state on/off switches, often represented by 1 or 0.

Question 12

Most programming languages support a NOT operator, which reverses the meaning of a Boolean expression.

Question 13

A structure that includes separate actions when an expression is true and when it is false is called a(n) ____ structure.

A)dual-alternative selection
C)single-alternative selection
B)diverging selection
D)null-alternative selection

Question 14

An AND decision can be constructed using a ____ decision.

A)nested
C)combined
B)stacked
D)dual

Question 15

Usually, a comparison operator is used to compare values of different data types.

Question 16

Only a few decisions you make in a computer program involve evaluating a Boolean expression.

Question 17

When using the OR operator, an action is taken when at least one of the comparisons evaluates to true.

Question 18

The structure that takes one of two paths based on a decision is called a(n) ____ structure.

A)if-then
C)if-then-else
B)if-else
D)if-endif

Question 19

Most programming languages allow you to express "greater than or equal to" by typing ____.

A)>=
C)==<
B)<=
D)==>

Question 20

For greatest program efficiency when using the AND operator, first ask the question that is more likely to be true.

Question 21

The ____________________ operator evaluates to true when its operands are considered to have the same value.

Question 22

In a(n) ____________________ selection, action is required for only one outcome of a question.

Question 23

A common error when using range checking is creating a(n) ____ path in the code.

A)unreachable
C)parallel
B)ending
D)decision

Question 24

A structured selection must have one entry point at the decision, and ____ exit point(s) when the two logical paths rejoin.

A)one
C)three
B)two
D)four

Question 25

What is one common error in using an OR selection?

A)using AND logic when OR is needed
C)using too many comparison operators
B)creating structured logic
D)using too few comparison operators

Question 26

When structures are "on top of" each other, they are known as ____________________ structures.

Question 27

A(n) ____ decision is used when either one of two conditions must be met.

A)case
C)AND
B)if
D)OR

Question 28

You can use ____ statements instead of using AND and OR operators.

A)conditional
C)nesting loop
B)stacked if
D)nesting if

Question 29

Which takes precedence when the two are combined in a single statement: AND or OR?

A)OR
C)whichever comes first
B)AND
D)whichever comes last

Question 30

When you need to ask multiple questions before an outcome is determined, you must create a ____.

A)dual condition
C)large condition
B)compound condition
D)coordinated condition

Question 31

You should never ask a question if there is ____ possible answer(s) or outcome(s).

A)an unknown set of
C)two or fewer
B)a known set of
D)only one

Question 32

When you use one or more ____ operators to combine two or more Boolean expressions, each Boolean expression must be true for the entire expression to be evaluated as true.

A)AND
C)NOT
B)OR
D)EQUALS

Question 33

Many programming languages allow you to use ____ to force an expression to evaluate first.

A)a pound sign
C)parentheses
B)an asterisk
D)quotation marks

Question 34

____ are diagrams used in mathematics and logic to help describe the truth of an entire expression based on the truth of its parts.

A)Text tables
C)Results tables
B)Truth tables
D)Yes/No tables

Question 35

In an AND decision, why is it good practice to make the first question the one that is less likely to be true?

A)This eliminates all instances of the second decision.
B)This eliminates as many instances of the second decision as possible.
C)This eliminates evaluation of the first decision.
D)This makes program execution longer.

Question 36

A(n) ____ of values is any series of contiguous values that fall between specified limits.

A)group
C)range
B)assortment
D)set

Question 37

A dual-alternative selection is also known as a(n) ____________________ structure.

Question 38

The value of a(n) ____________________ expression can only be true or false.

Question 39

In pseudocode, the if, else, and endif statements should align ____.

A)diagonally
C)vertically
B)on the same horizontal line
D)horizontally

Question 40

A series of nested if statements can also be called a ____ if statement.

A)layered
C)stacked
B)cascading
D)dual

Question 41

In a(n) ____________________ decision, more than one condition must be true for an action to take place.

Question 42

An AND decision can be constructed using a nested ____________________.

Question 43

When you use a(n) ____________________ operator, only one of the conditions in an expression must be true for the resulting action to take place.

Question 44

You might say that a path that can never be traveled in a program is a(n) ____________________ path.

Question 45

____________________ are diagrams used in mathematics and logic to help describe the truth of an entire expression.

Question 46

In a(n) ____________________ condition, you ask multiple questions before an outcome is determined.

Question 47

To perform a(n) ____________________, make comparisons using either the lowest or highest value in each range of values.

Question 48

An expression in which two constants are compared is called a(n) ____________________ expression.

Question 49

In _______________ evaluation, the computer always skips the second comparison when using an AND operator if the first comparison is false.

Question 50

The order in which operators are evaluated in an expression is determined by ____________________.