Code Safety · interview question
Which option is the safer default when shipping code around mutation and copying?
Multiple choiceHardchapter-3-curatedpremiumcode-safetymutation-and-copying
defaults = {"currency": "USD"}
payload = defaults.copy()
payload["currency"] = "EUR"
print(defaults, payload)Answer and explanation
Correct answer
D. Choose the simpler shape that keeps the rule obvious, validated, and easy to observe in logs or tests.
Why
The safest default is usually the one that lowers ambiguity and makes errors easier to diagnose.
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