Python Functions and Scope 2

Question 1

What does the `global` keyword do inside a function?

Accepted Answer

Declares that a variable refers to the global scope

Answer

Creates a new local variable

Answer

Deletes a global variable

Answer

Makes a variable read-only

Question 2

What is the output of: `def f(x=[]): x.append(1); return x` called three times?

Accepted Answer

[1], [1,1], [1,1,1]

Answer

[1], [1], [1]

Answer

Error on second call

Answer

[1], [], [1]

Question 3

Which LEGB scope is checked first when resolving a variable name in Python?

Accepted Answer

Local

Answer

Enclosing

Answer

Global

Answer

Built-in

Question 4

What does `*args` capture in a function definition?

Accepted Answer

Positional arguments as a tuple

Answer

Keyword arguments as a dict

Answer

All arguments as a list

Answer

Only the first extra argument

Question 5

What is a closure in Python?

Accepted Answer

A nested function that remembers its enclosing scope's variables

Answer

A function that calls itself

Answer

A function that modifies global variables

Answer

A function with no return value

Question 6

What will `print(type(lambda x: x))` output?

Accepted Answer

Answer

Answer

Answer

Question 7

Which statement about `nonlocal` is correct?

Accepted Answer

It allows a nested function to assign to an enclosing (non-global) variable

Answer

It allows access to global variables

Answer

It creates a new variable in the built-in scope

Answer

It is only available in Python 2