Question 1

Short-circuit evaluation is performed with the not operator.

Accepted Answer

FalseWhy: ...

Question 2

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

Accepted Answer

compound

Question 3

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

Accepted Answer

FalseWhy: ...

Question 4

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

Accepted Answer

FalseWhy: ...

Question 5

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

Accepted Answer

if y > 10 and y < 50

Question 6

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

Accepted Answer

FalseWhy: ...

Question 7

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

Accepted Answer

dual alternative

Question 8

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

Accepted Answer

True

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

Accepted Answer

FalseWhy: ... If (x=5) < (y=3), this is False.AND = the condition, both must be true.  (z=8) > (x=5), this is TrueThe whole statement is False because it uses the AND condition not the OR condition.

Question 10

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

Accepted Answer

False Why: ... First: NOT = operator #1, this means the value of this expression must be reversed. so...Second: [ (x=5) < (y=3), expression 1 is FalseThird: OR = the operator #2, one of these must be true. (z=8) > (x=5) ], expression 2 is True - so far the sub-expression 1, in brackets, is True.---> Now: you must reverse the value per first step. true value is now (-)FalseFourth: AND= operator #3, both (sub-expression 1 and sub-expression 2 ) must be true.(y=3) < (z=8), sub-expression 2 is True. ---> This means that expressions 2-4, or sub-expression1 and sub-expression 2, as a whole is (+)True. Finally: Remember two (-)negatives make a (+)positive. This contains one neg., First step and one pos., expression 2-4 as a whole, so this would print that the compound expression is False.

Question 11

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

Accepted Answer

TrueWhy: ... If (x=5) < (y=3), this is False.OR = the operator , one of these expressions must be true.  (z=8) > (x=5), this is TrueThe whole statement is True because it uses the OR operator not the AND condition.

Question 12

Decision structures are also known as selection structures.

Accepted Answer

True

Question 13

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

Accepted Answer

control

Question 14

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

Accepted Answer

true or false

Question 15

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

Accepted Answer

!=

Question 16

When using the ________ operator, both sub-expressions must be true for the compound expression to be true.

Accepted Answer

and

Question 17

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

Accepted Answer

True

Question 18

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

Accepted Answer

Or

Question 19

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

Accepted Answer

True

Question 20

Which logical operators perform short-circuit evaluation?

Accepted Answer

or, and

Question 21

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

Accepted Answer

True

Question 22

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

Accepted Answer

FalseWhy: ...

Question 23

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

Accepted Answer

==

Question 24

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

Accepted Answer

if choice != 10:

Question 25

What does the following expression mean?x <= y

Accepted Answer

x is less than or equal to y

COSC 1336 - Chapter 3 Quiz

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