Performance · interview question
A bug appears around data structure choice. What is the strongest first debugging move?
Multiple choiceMediumchapter-16-curatedpremiumperformancedata-structure-choice
sku_set = set(skus)
exists = "SKU-9" in sku_setAnswer and explanation
Correct answer
B. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. Sticking with the first convenient structure can add avoidable cost everywhere else.
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