Domain Modeling · interview question
A bug appears around mini domain model. What is the strongest first debugging move?
Multiple choiceHardchapter-7-curatedpremiumdomain-modelingmini-domain-model
cart = Cart(lines=[OrderLine(unit_price=9.99, quantity=2)])
print(cart.lines[0].line_total())Answer and explanation
Correct answer
C. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. If the model still feels like loosely connected containers, the chapter has not gone far enough.
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