Itertools is a powerful standard library in Python used to handle efficient looping, combinatorics, and memory-friendly data pipelines. These MCQs help you explore real-world applications of itertools functions with simple code-based questions.
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What is the primary use of the itertools module in Python?
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Question 2 of 15
2. Question
What does itertools.count(10, 2) do?
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Question 3 of 15
3. Question
Which function would you use to repeat an element multiple times?
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Question 4 of 15
4. Question
What does itertools.cycle([1, 2]) do?
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Question 5 of 15
5. Question
Which function combines multiple iterables into a single sequence?
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Question 6 of 15
6. Question
What is the output of this code?
from itertools import chain list(chain(‘AB’, ‘CD’))
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Question 7 of 15
7. Question
Which function returns all possible orderings (arrangements) of elements?
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Question 8 of 15
8. Question
What does combinations(‘ABCD’, 2) return?
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Question 9 of 15
9. Question
Which function returns all possible pairs, including repeated elements?
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Question 10 of 15
10. Question
What does this output?
from itertools import product list(product([1, 2], [3, 4]))
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Question 11 of 15
11. Question
What does accumulate([1, 2, 3]) return?
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Question 12 of 15
12. Question
How can you get all 2-length permutations of list [1, 2, 3]?
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Question 13 of 15
13. Question
Which function groups adjacent elements by a key function?
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Question 14 of 15
14. Question
What is required for groupby() to work correctly?
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Question 15 of 15
15. Question
Which itertools function is most memory-efficient for infinite loops?
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Summary
The itertools module is a powerful toolset for advanced iteration, permutations, combinations, and memory-efficient looping. These MCQs help solidify your understanding of Python’s most efficient functional tools.
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