Python Decorators and Closures 2

Question 1

What is a 'decorator factory' in Python?

Accepted Answer

A function that returns a decorator, allowing decorators to accept arguments

Answer

A built-in Python module for creating decorators

Answer

A class that automatically decorates all its methods

Answer

A design pattern for organizing multiple decorators

Question 2

When multiple decorators are stacked, in what order are they applied to the function?

@decorator_A
@decorator_B
def my_func():
    pass

Accepted Answer

decorator_B first, then decorator_A

Answer

decorator_A first, then decorator_B

Answer

Both are applied simultaneously

Answer

Order is determined randomly at runtime

Question 3

What is the purpose of the nonlocal keyword in Python closures?

Accepted Answer

To allow an inner function to modify a variable in the enclosing (non-global) scope

Answer

To declare a variable as global

Answer

To prevent a closure from accessing outer variables

Answer

To import variables from other modules

Question 4

What is a 'free variable' in the context of Python closures?

Accepted Answer

A variable used in a function but defined in an enclosing outer scope

Answer

A variable that doesn't consume memory

Answer

A global variable accessible from any function

Answer

A variable with no type annotation

Question 5

What attribute of a Python function object holds the free variables captured by a closure?

Accepted Answer

__closure__

Answer

__freevars__

Answer

__enclosed__

Answer

__scope__

Question 6

How many levels of function nesting are typically needed to create a parameterized decorator (a decorator that accepts its own arguments)?

Accepted Answer

3 levels — outer accepts args, middle accepts func, inner wraps the call

Answer

1 level — just the decorator function itself

Answer

2 levels — the decorator and the wrapper

Answer

4 or more levels are always required

Question 7

Can a decorator be applied to a class definition in Python?

Accepted Answer

Yes, class decorators receive the class as their argument and return a modified class

Answer

No, decorators only work with functions and methods

Answer

Only if the decorator is defined inside the class itself

Answer

Only built-in decorators can be applied to classes