Functions · interview question

Which naming or modeling choice is strongest for function extraction?

Multiple choiceMediumchapter-2-curatedpremiumfunctionsfunction-extraction

python

def calculate_subtotal(unit_price: float, quantity: int) -> float:
    return unit_price * quantity


def shipping_fee(subtotal: float) -> float:
    return 0 if subtotal >= 100 else 6.50

Use names and structures that describe the business fact directly instead of temporary implementation noise.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Solve the symptom with comments only and avoid changing the code shape around function extraction.Keep function extraction implicit so the script stays short and hope the next engineer infers the rule.

Answer and explanation

Correct answer

A. Use names and structures that describe the business fact directly instead of temporary implementation noise.

Why

Clear naming and modeling shorten debugging, review, and onboarding time.

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Which naming or modeling choice is strongest for function extraction?

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