Methods with return values in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this method call?

Consider the following Python code. What will be printed when result is printed?

Python

def multiply_by_two(x):
    return x * 2

result = multiply_by_two(5)
print(result)

A 25

B TypeError

C None

D 10

💡 Hint

Think about what the method returns when given 5.

The method multiplies the input by 2 and returns it. So 5 * 2 = 10.

❓ Predict Output

intermediate

What does this method return?

Look at this method. What will print(check_even(4)) output?

Python

def check_even(num):
    if num % 2 == 0:
        return True
    else:
        return False

print(check_even(4))

A False

B True

C None

D SyntaxError

💡 Hint

Check if 4 is divisible by 2.

4 is even, so the method returns True.

❓ Predict Output

advanced

What is the output of this recursive method?

What will be printed when factorial(4) is called and printed?

Python

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

print(factorial(4))

A 24

B 10

C 0

D RecursionError

💡 Hint

Factorial of 4 is 4 * 3 * 2 * 1.

The factorial of 4 is 24 because 4 * 3 * 2 * 1 = 24.

❓ Predict Output

advanced

What is the value of result after this method call?

Given this code, what will result hold after calling combine_strings('Hi', 'There')?

Python

def combine_strings(a, b):
    return a + ' ' + b

result = combine_strings('Hi', 'There')

A 'Hi + There'

B 'HiThere'

C 'Hi There'

D TypeError

💡 Hint

Look at how the strings are joined with a space.

The method returns the two strings joined by a space, so result is 'Hi There'.

❓ Predict Output

expert

What is the output of this method with default and keyword arguments?

What will be printed when greet('Alice', greeting='Hello') is called?

Python

def greet(name, greeting='Hi'):
    return f"{greeting}, {name}!"

print(greet('Alice', greeting='Hello'))

A "Hello, Alice!"

B "Hi, Alice!"

C "Hello Alice"

D TypeError

💡 Hint

Check which greeting is used when a keyword argument is passed.

The keyword argument greeting='Hello' overrides the default 'Hi', so the output is 'Hello, Alice!'.