Python Mastery Quiz — Quiz

Question 1 of 10

What does `sorted([3, 1, 2])` return?

aNoneb[1, 2, 3]c(1, 2, 3)dIt sorts in place

Question 2 of 10

Which module provides `Counter` and `defaultdict`?

aitertoolsbfunctoolsccollectionsdstatistics

Question 3 of 10

Which keyword turns a function into a generator?

areturnbasyncclambdadyield

Question 4 of 10

With `from pathlib import Path`, what is `Path('data/sales.csv').stem`?

asalesbsales.csvc.csvddata

Question 5 of 10

What does this print?

import re
print(re.findall(r'\d+', 'Order 12 costs 450 rupees'))

a['12 450']b[12, 450]c['12', '450']d['1', '2', '4', '5', '0']

Question 6 of 10

Why should CSV files be opened with `newline=''` when using the csv module?

aIt lets the csv module handle line endings correctly and avoids blank rows on WindowsbIt removes the header rowcIt makes reading faster by skipping empty linesdIt is required for UTF-8

Question 7 of 10

What is printed?

gen = (x * 2 for x in range(3))
print(sum(gen), sum(gen))

a6 6b6 0c0 6dTypeError

Question 8 of 10

Which `json.dumps` argument keeps Hindi text readable instead of `\u` escapes?

aindent=2bsort_keys=Truecdefault=strdensure_ascii=False

Question 9 of 10

Why use `functools.wraps` inside a decorator?

aIt copies the wrapped function's name, docstring and metadata onto the wrapperbIt makes the wrapper run fastercIt caches return valuesdIt is required for decorators to accept arguments

Question 10 of 10

What does this print?

def add(item, bucket=[]):
    bucket.append(item)
    return bucket
add(1)
print(add(2))

a[2]b[1, 2]c[1]d[]