Deck 3: Decision Structures and Boolean Logic

Question 1

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

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

Answer 1

B

Question 2

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

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

Answer 2

A

Question 3

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) true
B) false
C) 8
D) 5

Answer 3

A

Question 4

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

A) yes or no
B) true or false
C) T or F
D) Y or N

Question 5

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

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

Question 6

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

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

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

Question 9

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) true
B) false
C) 8
D) 5

Question 10

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

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

Question 11

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) true
B) false
C) 8
D) 5

Question 12

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

Question 13

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 14

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 15

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 16

The Python language is not sensitive to block structuring of code.

Question 17

Which logical operators perform short-circuit evaluation?

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

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

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

Question 20

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 21

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 22

The _______________ statement is used to create a decision structure.

Question 23

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

Question 24

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

Question 25

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

Question 26

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

Question 27

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

Question 28

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

Question 29

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

Question 30

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

Question 31

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

Question 32

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

Question 33

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

Question 34

Short-circuit evaluation is performed with the not operator.

Question 35

Decision structures are also known as selection structures.