Core Collections · interview question
Which move is the best default when sets becomes part of this workflow?
Multiple choiceMediumchapter-3-curatedpremiumcore-collectionssets
Answer and explanation
Correct answer
C. Use sets when the main question is whether something has already been seen or should be unique.
Why
Use sets when the main question is whether something has already been seen or should be unique. That is the stronger engineering move because this is a common interview comparison because it tests both complexity judgment and code clarity. Using a list for repeated membership checks adds unnecessary work and often obscures the intent.
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