What are function parameters with default values called?

Question

Function parameters with default values are called:

Answer choices

1. Special.
2. Named.
3. Positional.
4. Optional.
5. Ordinary.

Explanation

When a parameter has a default value, its corresponding argument can be omitted:

def greet(name='Guest'):
    return f'Hello, {name}!'

print(greet())

Calling the function without an argument uses 'Guest'. Such parameters are therefore called optional in this exercise. Passing an argument by name is a separate characteristic and does not itself imply a default value.