Domain Modeling · interview question

Which naming or modeling choice is strongest for instance methods?

Multiple choiceMediumchapter-7-curatedpremiumdomain-modelinginstance-methods

python

from dataclasses import dataclass

@dataclass
class OrderLine:
    unit_price: float
    quantity: int

    def line_total(self) -> float:
        return self.unit_price * self.quantity

Use names and structures that describe the business fact directly instead of temporary implementation noise.Solve the symptom with comments only and avoid changing the code shape around instance methods.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep instance methods 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 instance methods?

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