Data Cleanup · interview question

A teammate submits shaky safe output writes code. Which review comment is the strongest?

Multiple choiceMediumchapter-4-curatedpremiumdata-cleanupsafe-output-writes

Keep safe output writes 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.Make the rule clearer and easier to explain. Use safer write patterns when downstream consumers depend on the file existing in a coherent final state.Solve the symptom with comments only and avoid changing the code shape around safe output writes.

Answer and explanation

Correct answer

C. Make the rule clearer and easier to explain. Use safer write patterns when downstream consumers depend on the file existing in a coherent final state.

Why

The best review comment anchors the change to readability, correctness, and future maintenance. If a process dies mid-write and the target file was already replaced, the next job may read corrupt output.

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A teammate submits shaky safe output writes code. Which review comment is the strongest?

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