Interview Strategy · interview question

What is the healthiest performance judgment around thinking aloud through code?

Multiple choiceMediumchapter-20-curatedpremiuminterview-strategythinking-aloud-through-code

python

def running_total(lines: list[int]) -> int:
    total = 0
    for line in lines:
        total += line
    return total

Solve the symptom with comments only and avoid changing the code shape around thinking aloud through code.Keep thinking aloud through code implicit so the script stays short and hope the next engineer infers the rule.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Answer and explanation

Correct answer

D. Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Why

Premature optimization is usually weaker than targeted optimization backed by measurement.

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What is the healthiest performance judgment around thinking aloud through code?

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