Code Safety · interview question
Which move is the best default when mutation and copying become part of this workflow?
Multiple choiceHardchapter-3-curatedpremiumcode-safetymutation-and-copying
Answer and explanation
Correct answer
D. Copy or rebuild data intentionally when you need a new version instead of quietly mutating shared state.
Why
Copy or rebuild data intentionally when you need a new version instead of quietly mutating shared state. That is the stronger engineering move because candidates who speak clearly about mutation sound safer to trust with data-heavy systems. Shared mutable structures make later behavior depend on hidden history.
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