Python Set Quiz [15 Python Set MCQ Questions]

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. Which of the following is a common use case for Python sets?

Storing data that needs to maintain a specific order.

Counting the frequency of items in a list.

Efficiently removing duplicate elements from a sequence.

Storing key-value pairs for fast lookup.

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

sampleSet = {"Yellow", "Orange", "Black"}
print(sampleSet[1])

Yellow

Error

Orange

3. 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

4. When you iterate over a set using a for loop, what order are the elements guaranteed to be returned in?

Insertion order.

Sorted order.

Reverse insertion order.

No guaranteed order (arbitrary).

5. 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

6. 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}

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 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}

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

{}

set()

new_set = {}

All of the above

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. Which method removes a specified element from a set, but does not raise an error if the element is not found?

set.remove()

set.pop()

set.discard()

set.delete()

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

set1 = {10, 20, 30} 
set2 = {60, 10, 30, 80, 20, 50} 
print(set1.issubset(set2))
print(set2.issuperset(set1))

False
False

True
True

True
False

False
True

13. 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

14. 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}

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

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

None

{}

[]

set()

16. 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.

17. 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)

18. 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()

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

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

set2 = set1

20. 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

21. 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.

22. 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

23. What is a frozenset in Python?

A set that can only contain integer elements.

A mutable version of a regular set.

An immutable version of a regular set.

A set that stores elements in sorted order.

24. Which operation would you use to find elements that are in set_A but NOT in set_B?

set_A.intersection(set_B)

set_A.symmetric_difference(set_B)

set_A.difference(set_B)

set_A.union(set_B)

25. 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}

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