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HTTP/2 301 date: Tue, 30 Dec 2025 22:44:34 GMT content-type: text/html; charset=UTF-8 location: https://pynative.com/python-set-quiz/ cf-ray: 9b650ffeac8375e9-BLR cf-cache-status: BYPASS age: 0 cache-control: no-cache, max-age=0 expires: Tue, 30 Dec 2025 22:44:33 GMT server: cloudflare strict-transport-security: max-age=15552000; includeSubDomains; preload x-content-type-options: nosniff cf-apo-via: origin,page-rules cf-edge-cache: cache,platform=wordpress referrer-policy: strict-origin-when-cross-origin x-cache: MISS x-frame-options: SAMEORIGIN x-redirect-by: WordPress x-xss-protection: 1; mode=block vary: accept-encoding report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=ii%2B4zJ2R4M5MTByCx6UABwckQhphmKgx1PaLP1cIi1AHtB32iuiDKcIw8eUCFae4LGPtABWD1uenhaInO1m1bSorH1z2OR6Q9nSC"}]} nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} alt-svc: h3=":443"; ma=86400 HTTP/2 200 date: Tue, 30 Dec 2025 22:44:34 GMT content-type: text/html; charset=UTF-8 cf-ray: 9b6510018d7475e9-BLR cf-cache-status: BYPASS cache-control: no-cache, max-age=0 expires: Tue, 30 Dec 2025 22:44:34 GMT link: ; rel="https://api.w.org/", ; rel="alternate"; title="JSON"; type="application/json" server: cloudflare strict-transport-security: max-age=15552000; includeSubDomains; preload vary: Accept-Encoding, Accept-Encoding x-content-type-options: nosniff cf-apo-via: origin,page-rules cf-edge-cache: cache,platform=wordpress referrer-policy: strict-origin-when-cross-origin x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=V8FdZIa%2FRI%2FHcBg0Mn1Te2p2VAO1V5%2F3XWcNWOK4cgdGsWR%2BJAOSyaUaN5nRPswNeRigJYFNHr1Nt24qWzNNu35nSg89u151p0SY"}]} nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} content-encoding: gzip alt-svc: h3=":443"; ma=86400 Python Set Quiz [15 Python Set MCQ Questions]

Python Set Quiz

Updated on: August 26, 2025 | 17 Comments

This Python Set Quiz provides Multiple Choice Questions (MCQs) to help you test your understanding of Python sets. You’ll explore quiz questions on how to create sets, add and remove elements, and apply various set methods to manipulate data effectively.

Also, See:

Python Set Exercise
15 Python Quizzes: each focusing on a specific topic

The quiz contains 25 questions. There is no time limit.
Explanation is provided for each answer.
You will get 1 point for each correct answer. Solve 15 correctly to pass the test
Read guide on Sets In Python to solve this quiz.

1. What will be the output of the following code?

sampleSet = {"Yellow", "Orange", "Black"}
sampleSet.discard("Blue")
print(sampleSet)

{‘Yellow’, ‘Orange’, ‘Black’}

KeyError: ‘Blue’

2. What will be the output of the following set operation?

sampleSet = {"Yellow", "Orange", "Black"}
sampleSet.update(["Blue", "Green", "Red"])
print(sampleSet)

{‘Yellow’, ‘Orange’, ‘Red’, ‘Black’, ‘Green’, ‘Blue’}

{‘Yellow’, ‘Orange’, ‘Black’, [“Blue”, “Green”, “Red”]}

TypeError: update() doesn’t allow list as a argument.

3. What will be the output of the following Python code?

s1 = {1, 2, 3}
s2 = {3, 4, 5}
s3 = s1.difference(s2)
print(s3)

{1, 2, 3, 4, 5}

{3}

{1, 2}

{4, 5}

4. Select the correct options to remove “Orange” from the set.

sampleSet = {"Yellow", "Orange", "Black"}

sampleSet.pop("Orange")

sampleSet.discard("Orange")

del sampleSet ["Orange"]

5. Which of the following best describes a Python set?

An ordered, mutable collection that allows duplicate elements.

An unordered, immutable collection of unique elements.

An unordered, mutable collection of unique elements.

A collection of key-value pairs.

6. What will be the output of the following code?

s = {1, 'PYnative', True, 'True'} 
print(s)

{1, ‘PYnative’, True, ‘True’}

{1, ‘PYnative’, ‘True’}

Error

{1, ‘PYnative’, 1}

7. What will be the output of the following Python code?

s = {1, 2, 3, 2}
print(len(s))

Error

{1, 2, 3, 2}

8. What will be the output of the following Python code?

set_a = {1, 2, 3, 4}
set_b = {3, 4, 5, 6}
print(set_a ^ set_b)

{1, 2, 3, 4, 5, 6}

{3, 4}

{1, 2, 5, 6}

{1, 2}

9. Select all the correct ways to copy two sets?

set2 = set1.copy()
set2 = set(set1)
set2.update(set1)

set2 = set1

10. What will be the output of the following Python code?

s1 = {1, 2, 3}
s2 = {3, 4, 5}
s1.intersection_update(s2)
print(s1)

{1, 2, 3, 4, 5}

{3}

{1, 2}

{}

11. What is the output of the following union operation

set1 = {1, 2, 3}
set2 = {3, 4, 5}
print(set1.union(set2))

{1, 2, 3, 4, 5}

{3}

{1, 2, 4, 5}

{1, 2, 3}

12. What kind of elements can be stored in a Python set?

Any Python object.

Only numbers and strings.

Only mutable objects.

Only hashable (typically immutable) objects.

13. What will be the output of the following Python code?

my_set = {10, 20, 30}
my_set.clear()
print(my_set)

None

{}

[]

set()

14. The symmetric_difference() method returns a set that contains all items from both sets, but not the items that are present in both sets.

False

True

15. Which is the correct way to create an empty set?

{}

set()

new_set = {}

All of the above

16. Which method removes and returns an arbitrary element from a set, raising a KeyError if the set is empty?

set.remove_random()

set.extract()

set.pop()

set.get_any()

17. What will be the output of the following Python code?

letters = {'a', 'b', 'c'}
letters.update(['d', 'e'], {'f'})
print(sorted(list(letters)))

['a', 'b', 'c', 'd', 'e', 'f']

['a', 'b', 'c', ['d', 'e'], {'f'}]

['a', 'b', 'c', 'd', 'e']

Error

18. The isdisjoint() method returns True if none of the items are present in both sets, otherwise, it returns False.

True

False

19. What will be the output of the following code?

sampleSet = {"Yellow", "Orange", "Black"}
sampleSet.add("Blue")
sampleSet.add("Orange")
print(sampleSet)

{‘Yellow’, ‘Orange’, ‘Black’, ‘Blue’, ‘Orange’}

{‘Yellow’, ‘Orange’, ‘Black’, ‘Blue’}

{‘Yellow’, ‘Orange’, ‘Black’}

Error

20. How do you check if set_A is a subset of set_B (meaning all elements of set_A are also in set_B)?

set_A.is_subset_of(set_B)

set_A <= set_B

set_B.contains_all(set_A)

set_A.issubset(set_B) and set_A <= set_B

21. What will be the output of the following set operation?

a = {1, 2, 3}
b = {3, 4, 5}
a.difference_update(b)
print(a)

{1, 2, 3, 4, 5}

{3}

{1, 2}

{4, 5}

22. What is the difference between set.add(item) and set.update(iterable)?

add() adds an item to the set, update() modifies the original set by adding multiple items as a single element.

add() adds a single item, update() adds all items from an iterable.

add() returns a new set, update() modifies the original set.

add() can add duplicates, update() cannot.

23. What will be the output of the following Python code?

s = {1, 2, 3}
t = (1, 2, 3)
print(s == t)

True

False

Error

24. Which operation returns elements that are in set_A or set_B, but not in both?

set_A.union(set_B)

set_A.intersection(set_B)

set_A.symmetric_difference(set_B)

set_A.difference(set_B)

25. What will be the output of the following union operation?

set1 = {10, 20, 30, 40} 
set2 = {"10", 20, 30, 50} 
set3 = set1.union(set2) 
print(set3)

{10, 20, 30, 40, 50}

{20, 30}

{10, 20, 30, 40, ’10’, 50}

Error: Different types cannot be used with sets

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