Data Access · interview question
A bug appears around row mapping. What is the strongest first debugging move?
Multiple choiceHardchapter-11-curatedpremiumdata-accessrow-mapping
row = ("ORD-1", 8800)
order = {"id": row[0], "subtotal_cents": row[1]}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. Letting raw row tuples leak upward makes the service layer harder to read and easier to break.
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