A) What is the primary purpose of the contextlib.nullcontext?

B) In custom context managers, __exit__ receives how many arguments besides self?

C) What is the advantage of using the contextlib.ExitStack?

D) Custom context managers can be created using which of the following?

E) What exception does a context manager's __exit__ method parameters allow to handle?

F) Which is NOT a built-in context manager in Python?

G) The contextlib module's contextmanager decorator is used with:

H) What does the with statement in Python simplify?

I) How can context managers benefit your code?

J) What method is called upon exiting a context manager, regardless of an exception being raised or not?

K) What does using contextlib.suppress accomplish?

L) When might you prefer a function-based context manager over a class-based one?

M) The with statement can manage multiple context managers in a single line using:

N) What type of object does the with statement expect?

O) Which of the following is a common mistake when using context managers?

P) Which of the following is a valid use case for context managers?

Q) Which module provides utilities for creating context managers?

R) Which method is called when entering a context manager?

S) Can context managers be nested within each other?

T) What does the __exit__ method return to suppress exceptions?