Code HS Unit 4 Review

Which of the following is not a valid value for a boolean?

• True

• False

• yes

• All are valid

After the following code runs, what is the value of is_weekend?

• True

• False

• "is_weekend"

• "is_saturday || is_sunday"

What symbol represents the and operator in Python?

• AND

• and

• &

• &&

What symbol represents the or operator in Python?

• OR

• or

• |

• | |

When using "and" as a Boolean operator, what must happen for the phrase to be True?

• All conditions must be True

• Just one condition must be True

• No conditions are True

• None of the choices are correct

What is the proper way to compare if two values are equal in a boolean expression in Python?

• =

• ==

• EQUALS

• is

What is the proper operator for “not equals” in Python?

• =!

• !=

• ~=

• NOT EQUALS

The AP Exam uses the following relational (comparison) operators: =, ≠, >, <, ≥, and ≤.

As well, AND, OR and NOT are used instead of and, or and not.

A comparison using a relational operator evaluates to a Boolean value. For example, a = b evaluates to true if a and b are equal; otherwise, it evaluates to false.

Determine whether the following expression would evaluate to true or false.

• false

• true

Determine whether the following expression would evaluate to true or false.

• false

• true

Which of the following Boolean expressions is equivalent to the expression

a AND (b OR c)

• (a AND b) OR c

• (a AND b) or (a AND c)

• (a AND b) AND (a AND c)

• (b AND c) OR a