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Functions · interview question

Which option is the safer default when shipping code around return values?

Multiple choiceHardchapter-2-curatedpremiumfunctionsreturn-values
python
def discount_rate(is_vip: bool, subtotal: float) -> float:
    if is_vip and subtotal >= 100:
        return 0.15
    return 0.0
Choose one answer
Answer and explanation

Correct answer

A. 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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