Python Variables Quiz

What is a variable?

• A tool to run Python programs

• A container that holds information

• A mathematical equation

• A Python function

Which of the following is NOT a rule for naming variables in Python?

• A variable name must start with a letter or underscore

• Variable names are case-sensitive

• A variable name can start with a number

• A variable name can contain alpha-numeric characters and underscores

What does the single equal sign (=) in Python do?

• It compares two values

• It assigns a value to a variable

• It divides one value by another

• It creates a new variable

How many variables are created in the following code? cars = 100 space_in_a_car = 4.0 drivers = 30 passengers = 90 cars_not_driven = cars - drivers cars_driven = drivers carpool_capacity = cars_driven * space_in_a_car average_passengers_per_car = passengers / cars_driven

• 4

• 6

• 8

• 10

Which of the following variable names is INVALID in Python?

• my_variable

• _age

• 1name

• Name

What is the purpose of the following line in the code? cars_not_driven = cars - drivers

• It creates a variable called cars_not_driven and assigns it the sum of cars and drivers

• It creates a variable called cars_not_driven and assigns it the difference between cars and drivers

• It prints the value of cars_not_driven

• It declares the value of cars and drivers

What is the output of this line of code if drivers = 30 and space_in_a_car = 4.0? carpool_capacity = drivers * space_in_a_car print(carpool_capacity)

• 34.0

• 120

• 12

• 90

Which of the following is good practice when writing variable assignments in Python?

• x=100

• x =100

• x = 100

• x= 100

Can you create a variable with the name car-speed?

• Yes, because dashes are allowed in variable names

• No, because dashes are not allowed in variable names

• Yes, because Python ignores dashes

• No, because variable names must contain only numbers

What does the following code do? average_passengers_per_car = passengers / cars_driven

• Divides the number of passengers by cars driven and stores the result in a variable

• Multiplies the number of passengers by cars driven and stores the result in a variable

• Prints the value of passengers divided by cars_driven

• Adds the number of passengers to cars driven