HTTP JSON APIs · interview question
What should the DTO-to-domain translation step usually do?
Multiple choiceMediumchapter-11-curatedpremiumhttp-json-apisjackson-objectmapper
Answer and explanation
Correct answer
C. Validate required fields, normalize units, and reject incomplete responses
Why
A boundary translator is the right place to validate nullability, convert units like cents into money objects, and decide how to handle incomplete or surprising payloads before the data reaches domain logic.
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