Exceptions · interview question
Why validate an empty cart or invalid quantity before contacting inventory or payment systems?
Multiple choiceMediumchapter-6-curatedpremiumexceptionsfail-fast-validation
Answer and explanation
Correct answer
B. To reject cheap invalid state before expensive or irreversible work begins
Why
Fail-fast validation keeps invalid state from spreading and avoids wasting network calls or partial external actions on requests that should have been rejected immediately.
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