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

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

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

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

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

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

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

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

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

J) How can context managers benefit your code?

K) What does the with statement in Python simplify?

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

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

N) Can context managers be nested within each other?

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

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

Q) What does using contextlib.suppress accomplish?

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

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

T) Which module provides utilities for creating context managers?