Python - Lesson 5 - More Functions

What is the purpose of the modulus operator in Python?

• To round off decimal numbers

• To perform string concatenation

• To find the remainder of a division

• To calculate the square root of a number

Answer explanation

The purpose of the modulus operator in Python is to find the remainder of a division, making it the correct choice among the options provided.

What is the Luhn algorithm used for in Python?

• Converting units of measurement

• Calculating running totals

• Validating identification numbers

• Generating random numbers

Answer explanation

The Luhn algorithm is used for validating identification numbers in Python, not for converting units of measurement, calculating running totals, or generating random numbers.

What is the purpose of the running total pattern in Python?

• To generate random integers

• To keep track of a cumulative total

• To validate credit card numbers

• To calculate the mean of a set of numbers

Answer explanation

To keep track of a cumulative total

What is the significance of initializing a variable in Python?

• To delete the variable from memory

• To display the variable value

• To prevent the variable from being used

• To assign a value to the variable for the first time

Answer explanation

To assign a value to the variable for the first time

What does the modulus operator return when dividing by 0 in Python?

• Infinity

• Undefined

• 1

• 0

Answer explanation

The modulus operator in Python returns 'Undefined' when dividing by 0, as division by zero is not defined and results in an error.

What is the purpose of the abs() function in Python?

• To generate random integers

• To round off decimal numbers

• To validate identification numbers

• To calculate the absolute value of a number

Answer explanation

The abs() function in Python is used to calculate the absolute value of a number, which means it returns the positive value of the number regardless of its sign.

What is the purpose of the pow() function in Python?

• To raise a number to a power

• To calculate the square root of a number

• To perform string concatenation

• To find the remainder of a division

Answer explanation

The purpose of the pow() function in Python is to raise a number to a power, making it the correct choice among the options provided.

What is the purpose of the random.randint() function in Python?

• To convert units of measurement

• To validate credit card numbers

• To calculate running totals

• To generate random integers

Answer explanation

The purpose of the random.randint() function in Python is to generate random integers.

What does the len() function return when used on an empty list in Python?

• 0

• 1

• Undefined

• Infinity

Answer explanation

The len() function returns 0 when used on an empty list in Python, as an empty list has no elements to count.

What is the purpose of the max() function in Python?

• To find the maximum value in a list

• To convert units of measurement

• To validate credit card numbers

• To calculate running totals

Answer explanation

To find the maximum value in a list