Modules & Packages — Python Questions with Answers

Q1. easy

What is a module in Python?

1. A A .py file whose functions/variables you can import and reuse
2. B A type of loop
3. C A compressed archive
4. D A class method

Q2. easy

After 'import math', how do you call its square root function?

import math
print(math.sqrt(16))   # 4.0
print(math.pi)          # 3.141592653589793

1. A math.sqrt(16)
2. B sqrt(16)
3. C math->sqrt(16)
4. D import sqrt(16)

Q3. easy

What does 'from math import sqrt' let you write?

from math import sqrt, pi
print(sqrt(16))   # 4.0
print(pi)          # 3.14159...

1. A sqrt(16) - directly, without the math. prefix
2. B math.sqrt(16) only
3. C Nothing - it's invalid
4. D sqrt.math(16)

Q4. easy

What does 'import numpy as np' do?

import numpy as np
import pandas as pd
arr = np.array([1, 2, 3])

1. A Imports numpy under the shorter alias np
2. B Imports only the np part of numpy
3. C Renames the numpy package on disk
4. D Creates a copy of numpy

Q6. easy

What does random.randint(1, 6) return?

import random
dice = random.randint(1, 6)   # 1,2,3,4,5 or 6

1. A A random integer from 1 to 6, BOTH ends included - like a dice roll
2. B 1 to 5 (6 excluded)
3. C A random float
4. D Always 6

Q7. easy

Which picks ONE random item from a list?

import random
winner = random.choice(["Ana", "Ben", "Cy"])
print(winner)

1. A random.choice(items)
2. B random.pick(items)
3. C items.random()
4. D random.one(items)

Q9. easy

What do math.floor(2.7) and math.ceil(2.1) return?

import math
print(math.floor(2.7))   # 2
print(math.ceil(2.1))    # 3

1. A 2 and 3
2. B 3 and 2
3. C 2.7 and 2.1
4. D 3 and 3

Q10. easy

How do you get today's date?

from datetime import date, datetime
print(date.today())      # 2026-07-03
print(datetime.now())    # 2026-07-03 14:30:05.123

1. A from datetime import date; date.today()
2. B import today
3. C time.today()
4. D date.now.today

Q11. easy

Which pauses the program for 2 seconds?

import time
print("3...")
time.sleep(1)
print("2...")

1. A time.sleep(2)
2. B time.wait(2)
3. C sleep.time(2)
4. D pause(2)

Q12. easy

What is pip?

# in the terminal (not in Python!):
pip install requests
pip list            # show installed packages

1. A Python's package installer - downloads third-party libraries from PyPI
2. B A Python IDE
3. C A file format
4. D Python's debugger

Q21. easy

Which computes the average of [80, 90, 100] using the standard library?

import statistics
print(statistics.mean([80, 90, 100]))    # 90
print(statistics.median([1, 3, 99]))      # 3

1. A statistics.mean([80, 90, 100])
2. B math.average([80, 90, 100])
3. C avg([80, 90, 100])
4. D numpy only can do this

Q28. easy

Which command shows every package pip has installed?

1. A pip list
2. B pip show all
3. C python --packages
4. D pip everything

Q5. medium

Why is 'from math import *' discouraged?

# unclear:
from math import *
print(floor(2.7))    # where's floor from?

# clear:
import math
print(math.floor(2.7))

1. A It dumps EVERY name into your file - unclear origins, and it can silently overwrite your own variables
2. B It's slower to run
3. C It's a syntax error
4. D It only imports half the module

Q8. medium

What does random.random() return?

import random
print(random.random())        # e.g. 0.7134...
print(random.uniform(1, 10))  # float between 1 and 10

1. A A float from 0.0 up to (but not including) 1.0
2. B A random integer
3. C 0 or 1
4. D A float from -1 to 1

Q13. medium

What is the STANDARD LIBRARY?

1. A The modules that ship WITH Python - math, random, os, json... no pip needed
2. B Any code on GitHub
3. C Packages you must pay for
4. D Only the built-in functions like print

Q14. medium

You wrote helpers.py with a function greet(). How does main.py (same folder) use it?

# helpers.py
def greet(name):
    return f"Hello {name}"

# main.py
import helpers
print(helpers.greet("Ana"))

1. A import helpers, then helpers.greet()
2. B include helpers.py
3. C using helpers
4. D You can't import your own files

Q17. medium

Which exception does 'import nosuchmodule' raise?

try:
    import numpy
except ModuleNotFoundError:
    print("run: pip install numpy")

1. A ModuleNotFoundError
2. B FileNotFoundError
3. C NameError
4. D KeyError

Q18. medium

What does dir(math) show?

import math
print(dir(math))
# ['ceil', 'cos', 'floor', 'pi', 'sqrt', ...]

1. A Every name (functions, constants) defined in the math module
2. B The folder containing math
3. C The math source code
4. D Math homework

Q19. medium

What is the os module mainly for?

import os
print(os.getcwd())          # current folder
print(os.listdir("."))     # files in it
os.makedirs("output", exist_ok=True)

1. A Talking to the operating system - files, folders, paths, environment variables
2. B Object serialization
3. C Online services
4. D Optimizing speed

Q20. medium

What does collections.Counter do? Counter(["a", "b", "a", "a"])

from collections import Counter
votes = ["ana", "ben", "ana", "ana"]
c = Counter(votes)
print(c)                  # Counter({'ana': 3, 'ben': 1})
print(c.most_common(1))   # [('ana', 3)]

1. A Counts occurrences: Counter({'a': 3, 'b': 1})
2. B Counts to infinity
3. C Removes duplicates
4. D Sorts the list

Q24. medium

You named your script random.py and 'import random' now breaks. Why?

1. A Your own file shadows the standard random module - Python imports YOUR file instead
2. B random was removed from Python
3. C You must restart the computer
4. D randint is Python 2 only

Q25. medium

What does sys.argv contain?

import sys
# python app.py Ana
print(sys.argv)        # ['app.py', 'Ana']
print(sys.argv[1])     # Ana

1. A The command-line arguments: sys.argv[0] is the script name, the rest are user-supplied
2. B All environment variables
3. C The Python version
4. D System errors

Q26. medium

What does math.pi ** 2 compute, roughly?

import math
print(math.pi ** 2)     # 9.869...
area = math.pi * r**2   # circle area

1. A 9.87 (pi squared)
2. B 6.28 (2 pi)
3. C 3.14
4. D Error - pi is a function

Q29. medium

What is requirements.txt used for?

# requirements.txt
requests==2.31.0
numpy>=1.24

# install everything:
pip install -r requirements.txt

1. A Listing a project's package dependencies so others can 'pip install -r requirements.txt'
2. B Python's TODO list
3. C License requirements
4. D The program's system requirements

Q30. medium

Which import style does PEP 8 recommend at the TOP of a file?

import os
import json

import requests

from myapp import helpers

1. A Standard library first, then third-party, then your own modules - in separate groups
2. B Alphabetical single list, mixed
3. C Imports go at the bottom
4. D One giant from x import *

Q15. hard

What is the purpose of: if __name__ == "__main__": main()

# helpers.py
def greet(): ...

if __name__ == "__main__":
    greet()   # runs only via: python helpers.py
              # NOT when: import helpers

1. A Run main() only when the file is executed DIRECTLY - not when it's imported by another file
2. B Declare the program's name
3. C Make the file importable at all
4. D It's required in every Python file

Q16. hard

print("loading!") sits at the TOP of helpers.py (outside any function). What happens on 'import helpers'?

# helpers.py
print("loading!")     # runs on import!
def greet(): ...

# main.py
import helpers   # prints: loading!
import helpers   # (cached - nothing prints)

1. A It prints 'loading!' - top-level code RUNS at import time (but only on the first import)
2. B Nothing - imports never execute code
3. C SyntaxError
4. D It prints on every import statement, even repeated ones

Q22. hard

What is a PACKAGE, as opposed to a module?

myapp/
  __init__.py
  utils.py
  models.py

# usage:
from myapp import utils
from myapp.models import User

1. A A folder of modules (traditionally marked by an __init__.py file) - importable as package.module
2. B A zip file
3. C Any file over 1000 lines
4. D A module with classes

Q23. hard

Where does Python LOOK for modules when you import?

import sys
print(sys.path)

1. A The script's folder, then the paths in sys.path (standard library, installed packages)
2. B The whole hard drive
3. C Only the standard library
4. D The internet

Q27. hard

What is a circular import?

1. A a.py imports b.py while b.py imports a.py - one gets a half-loaded module and often crashes
2. B Importing the same module twice
3. C Importing with a loop
4. D A pip feature