Understanding Python Functions and Parameters

What is a function in Python?

• A built-in calculator

• A reusable block of code that performs a specific task

• A type of variable

• A mathematical formula

What happens when you call a function?

• The function is deleted

• The function is stored for later

• The function executes its code

• Nothing happens

What is a parameter in a function?

• A special type of comment

• A variable passed into a function

• A built-in function in Python

• A print statement inside a function

What will be the output of this code?

def double_number(x):

print(2 * x)

double_number(10) ```

• 5

• 10

• 20

• Error

Which of the following correctly defines a function?

• `def my_function(): print("Hello!")`

• `my_function() = print("Hello!")`

• `function my_function(): print("Hello!")`

• `define my_function(): print("Hello!")`

What happens if you call a function without passing a required parameter?

• It runs without errors

• It prints None

• It raises an error

• It assigns a default value

Which of the following is true about function parameters?

• You can pass multiple parameters separated by commas

• Function parameters must always have default values

• Functions cannot have parameters

• Python does not allow parameters in functions

What will be the output of this code? ```python def print_a_number(num): print(num) print_a_number(10) print_a_number(20) print_a_number(30) ```

• 30, 20, 10

• 10, 20, 30

• Error

• 10, 30, 20

What happens when a function parameter has a default value?

• The function must always use that value

• The function cannot override the default value

• The function uses the default value only if no argument is provided

• Default values cause syntax errors

Why does this function cause an error?

def print_sum(first=10, second):

print(first + second)

• Functions cannot take parameters

• The second parameter does not have a default value

• The first parameter must come after the second

• The function name is incorrect