Python Sets MCQs: Exam-Centric Practice for Set Operations

1

Which of the following data types in Python is mutable and does not allow duplicate elements?

A) Set B) List C) Tuple D) Dictionary

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Answer & Solution

Answer: Option A

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2

How can you add an element to a set in Python?

A) add() B) insert() C) append() D) extend()

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Answer & Solution

Answer: Option A

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3

Which method is used to remove an element from a set?

A) remove() B) delete() C) discard() D) pop()

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Answer & Solution

Answer: Option A

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4

What does the len() function do when applied to a set or tuple?

A) Returns the number of elements in the set or tuple B) Converts the set or tuple to lowercase C) Converts the set or tuple to uppercase D) Removes the last element

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Answer & Solution

Answer: Option A

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5

What is the purpose of the set() constructor in Python?

A) Creates a new set B) Converts a list to a set C) Converts a string to a set D) Creates a tuple

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Answer & Solution

Answer: Option A

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6

What is the purpose of the union() method for sets?

A) Returns a new set with elements from both sets B) Combines elements of two sets C) Returns the intersection of two sets D) Returns the difference of two sets

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Answer & Solution

Answer: Option A

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7

In Python, how can you check if an element exists in a set?

A) in keyword B) exists() C) contains() D) check()

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Answer & Solution

Answer: Option A

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8

What method is used to remove an element from a set without raising an error if the element is not present?

A) discard() B) delete() C) remove() D) pop()

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Answer & Solution

Answer: Option A

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9

What is the output of the following code:

my_set = {1, 2, 3}
print(my_set)

A) {1, 2, 3} B) 1, 2, 3 C) [1, 2, 3] D) Error

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Answer & Solution

Answer: Option A

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10

What will be the output of the following code:

my_set = {1, 2, 3}
my_set.add(4)
print(my_set)

A) {1, 2, 3} B) {4, 1, 2, 3} C) {1, 2, 3, 4} D) {3, 2, 1}

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Answer & Solution

Answer: Option B

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