5.18. Functions Multiple Choice Questions

Q-1: Select all the parts that are absolutely needed to create and call a function.

• function header (including the definition and the name)
• Correct!
• function body
• Correct!
• variables
• Variables are not absolutely needed to create a function. For example, a function can just contain a print statement.
• return statement
• A return statement is not absolutely needed to create a function. For example, a print statement can be used instead of a return statement.
• function call
• Correct!

Q-2: What will be returned after calling modulus(100,95) and modulus(95.3,100.5) and modulus(12,12)?

def modulus(num1, num2):
    answer = num1 % num2
    return answer

• 5 and 5.2 and 1
• Incorrect! When you do a smaller number % a larger number, the answer will always be the smaller number. When you do a number % the same number, the answer will always be 0.
• 5 and 95.3 and 0
• Correct!
• 100 and 95.3 and 12
• Incorrect! When you do a larger number % a smaller number, the answer will be the remainder of the larger number divided by the smaller number. When you do a number % the same number, the answer will always be 0.
• 95 and 100.5 and 0
• Incorrect! When you do a larger number % a smaller number, the answer will be the remainder of the larger number divided by the smaller number. When you do a smaller number % a larger number, the answer will always be the smaller number.
• 5 and 100.5 and 1
• Incorrect! When you do a smaller number % a larger number, the answer will always be the smaller number. When you do a number % the same number, the answer will always be 0.

Q-3: What will be printed after calling divide(100, 95) and divide(5, 7) and divide(7, 5)? (Note: Ignore whitespaces.)

def divide(num1, num2):
    single_div_answer = num1 / num2
    print(round(single_div_answer, 2))
    double_div_answer = num1 // num2
    print(round(double_div_answer, 2))

• 1, 1.05, 0, 0.71, 1, 1.4
• Incorrect! Single division is floating point division. Double division is integer division, and it outputs the floor of the value.
• 1.05, 5, 0.71, 5, 1.4, 2
• Incorrect! Single division is floating point division. Double division is integer division, and it outputs the floor of the value.
• 1.05, 2, 0.71, 1, 1.4, 2
• Incorrect! Single division is floating point division. Double division is integer division, and it outputs the floor of the value.
• 1.05, 1, 0.71, 1, 1.4, 1
• Incorrect! Single division is floating point division. Double division is integer division, and it outputs the floor of the value.
• 1.05, 1, 0.71, 0, 1.4, 1
• Correct!

Q-4: After running the following code, what will the output be?

def multiplication_one(num1, num2):
    num1 * num2

print(multiplication_one(5, 10))

def multiplication_two(num1, num2):
    return num1 * num2

multiplication_two(5, 10)

• None will be outputted after printing and calling multiplication_one(5, 10). Nothing will be outputted after calling multiplication_two(5, 10).
• Correct!
• Nothing will be outputted after printing and calling multiplication_one(5, 10). None will be outputted after calling multiplication_two(5, 10).
• Incorrect! None is printed when you print and call a function and there is no return statement in the function body. Nothing is outputted when you call a function that only has a return statement and you don't print the function call.
• 50 will be outputted after printing and calling multiplication_one(5, 10) and after calling multiplication_two(5, 10).
• Incorrect! None is printed when you print and call a function and there is no return statement in the function body. Nothing is outputted when you call a function that only has a return statement and you don't print the function call.
• None will be outputted after printing and calling multiplication_one(5, 10). 50 will be outputted after calling multiplication_two(5, 10).
• Incorrect! Nothing is outputted when you call a function that only has a return statement and you don't print the function call.
• 50 will be outputted after printing and calling multiplication_one(5, 10). Nothing will be outputted after calling multiplication_two(5, 10).
• Incorrect! None is printed when you print and call a function and there is no return statement in the function body.

Q-5: What would be outputted after running the code below? (Note: Ignore whitespaces.)

def addition(num1, num2):
    return(num1 + num2)

def subtraction(num1, num2):
    print(num1 - num2)

def main():
    add_answer = addition(2, 4)
    new_add_answer = addition(add_answer, 105)
    print(subtraction(new_add_answer, 200))

main()

• None and -89
• Incorrect! When you print a function call (e.g., print(subtraction(new_add_answer, 200))) and the function prints an output (e.g., def subtraction(num1, num2): print(num1 - num2)), the output will be printed first due to the function call. Then, printing the function call will output None because the function does not have a return statement.
• None
• Incorrect! When you print a function call (e.g., print(subtraction(new_add_answer, 200))) and the function prints an output (e.g., def subtraction(num1, num2): print(num1 - num2)), the output will be printed first due to the function call. Then, printing the function call will output None because the function does not have a return statement.
• -89
• Incorrect! When you print a function call (e.g., print(subtraction(new_add_answer, 200))) and the function prints an output (e.g., def subtraction(num1, num2): print(num1 - num2)), the output will be printed first due to the function call. Then, printing the function call will output None because the function does not have a return statement.
• -89 and None
• Correct!

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