4.3 From pseudocode to Python functions - Quiz

Section 4.3 Quiz: From pseudocode to Python functions

1. What keyword is used to define a function in Python?

   • function
   • def { data-correct }
   • define
   • func

2. What does the return statement do in a function?

   • Prints a value to the screen
   • Sends a value back to the code that called the function { data-correct }
   • Ends the program
   • Starts a new function

3. What will this mystery(5)?function return when called as

   def mystery(x):
       result = x * 2
       print(result)
   

   • 10
   • 5
   • None { data-correct }
   • An error occurs

4. Which of the following is the correct way to call a calculate_area with parameters length=10 and width=5?function named

   • calculate_area(10, 5) { data-correct }
   • calculate_area[10, 5]
   • def calculate_area(10, 5)
   • return calculate_area(10, 5)

5. What is the Single Responsibility Principle for functions?

   • Functions should only use single-character variable names
   • Functions should only be called once in a program
   • Functions should do one specific task well { data-correct }
   • Functions should only have one parameter

6. What is a parameter in a function?

   • The value the function returns
   • Information passed to the function when it’s called { data-correct }
   • The function’s name
   • The first line of the function body

7. What is wrong with this function definition?

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

   • The function name should be capitalized
   • Default parameters must come after non-default parameters { data-correct }
   • The return statement should use + instead of f-strings
   • Nothing is wrong with it

8. What will be the output of this code?

   def double(x):
       return x * 2
   
   def triple(x):
       return x * 3
   
   result = double(triple(4))
   print(result)
   

   • 12
   • 14
   • 24 { data-correct }
   • 10

9. Which of the following best describes a “pure function”?

   • A function that only uses built-in Python functions
   • A function with no syntax errors
   • A function that always produces the same output for the same inputs and has no side effects { data-correct }
   • A function that doesn’t use any parameters

10. What should you include in every function to explain what it does?

    • A comment at the end of the function
    • A docstring immediately after the function definition { data-correct }
    • A print statement showing the function name
    • A global variable with the function description