Deck 4: Decision Structures and Boolean Logic

Question 1

A Boolean variable can reference one of two values: _____.

A) yes or no
B) t or false
C) T or f
D) Y or N

Answer 1

B

Question 2

Nested decision structures are one way to test more than one condition.

Answer 2

True

Question 3

In Python the _____ symbol is used as the equality operator.

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

Answer 3

A
t/false

Question 4

Python uses the same symbols for the assignment operator and the equality operator.

Question 5

The decision structure that has two possible paths of execution is known as _____.

A) single alternative
B) double alternative
C) dual alternative
D) two alternative

Question 6

The if statement causes one or more statements to execute only when a Boolean expression ist.

Question 7

Which of the following is the correct if clause to determine whether y is in the range 10 through 50?

A) if 10 < y or y > 50
B) if 10 > y and y < 50
C) if y > 10 and y < 50
D) if y > 10 or y < 50

Question 8

In Python, the _____ symbol is used as the not-equal-to operator.

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

Question 9

Python allows you to compare strings, but it is not case sensitive.

Question 10

When using the _____ operator, one or both subexpressions must bet for the compound expression to bet.

A) Or
B) And
C) Not
D) Maybe

Question 11

A(n) _____ structure is a logical design that controls the order in which a set of statements execute.

A) function
B) control
C) sequence
D) iteration

Question 12

Which of the following is the correct if clause to use to determine whether choice is other than 10?

A) if choice != 10:
B) if choice != 10
C) if choice <> 10:
D) if choice <> 10

Question 13

What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? not (x < y or z > x) and y < z

A) t
B) false
C) 8
D) 5

Question 14

When using the _____ operator, both subexpressions must bet for the compound expression to bet.

A) or
B) and
C) not
D) maybe

Question 15

What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? x < y and z > x

A) t
B) false
C) 8
D) 5

Question 16

What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? x < y or z > x

A) t
B) false
C) 8
D) 5

Question 17

t/false: The Python language is not sensitive to block structuring of code.

Question 18

Multiple Boolean expressions can be combined by using a logical operator to create _____ expressions.

A) sequential
B) logical
C) compound
D) mathematical

Question 19

What does the following expression mean? x <= y

A) x is less than y
B) x is less than or equal to y
C) x is greater than y
D) x is greater than or equal to y

Question 20

Which logical operators perform short-circuit evaluation?

A) or, not
B) not, and
C) or, and
D) and, or, not

Question 21

In flowcharting, the _______________ symbol is used to represent a Boolean expression.

Question 22

A(n) _______________ expression is made up of two or more Boolean expressions.

Question 23

In a decision structure, the action is _______________ executed because it is performed only when a certain condition ist.

Question 24

Short-circuit evaluation is performed with the not operator.

Question 25

An action in a single alternative decision structure is performed only when the condition ist.

Question 26

Boolean variables are commonly used as _______________ to indicate whether a specific condition exists.

Question 27

The logical _______________ operator reverses the truth of a Boolean expression.

Question 28

Python provides a special version of a decision structure known as the _______________ statement, which makes the logic of the nested decision structure simpler to write.

Question 29

Decision structures are also known as selection structures.

Question 30

The _______________ statement is used to create a decision structure.

Question 31

Expressions that are tested by the if statement are called Boolean expressions.

Question 32

A(n) _______________ decision structure provides only one alternative path of execution.

Question 33

The not operator is a unary operator and it must be a compound expression.

Question 34

A(n) _______________ statement will execute one block of statements if its condition ist, or another block if its condition is false.

Question 35

A(n) _______________ operator determines whether a specific relationship exists between two values.