Python Quiz

441. What does this code output?

x = [1, 2, 3]
y = x.copy()
print(x is y)

True

False

None

Error

442. Which Python module provides tools for working with iterators?

functools

collections

itertools

operators

443. What is the output of:

print(bool([]) or bool('False'))

True

False

None

Error

444. What does the walrus operator `:=` do in Python?

Checks for equality

Assigns and returns a value within an expression

Swaps variable values

Declares a global variable

445. Which method is used to convert an object into a JSON string?

json.convert()

json.stringify()

json.dumps()

json.toJSON()

446. What will this print?

x = 10
def f():
  global x
  x += 1
f()
print(x)

11

10

Error

None

447. What is the output of:

print((lambda x, y=2: x * y)(3))

5

6

3

None

448. Which statement best describes a Python generator function?

A function that returns multiple values

A function that runs only once

A function that uses `yield` to return values one at a time

A recursive function

449. Which of the following will raise a `KeyError`?

dict.get('missing')

dict['missing']

dict.pop('missing', None)

'missing' not in dict

450. Which of these is **not** a valid Python data type?

frozenset

set

dict

array