Java Threading · interview question
Which rule is strongest for enforcing inventory correctness across multiple application instances?
Multiple choiceHardchapter-15-curatedpremiumjava-threadingrace-conditions
Answer and explanation
Correct answer
A. A conditional database update such as UPDATE... WHERE stock >=?
Why
When stock truth lives in the database, the final invariant must be enforced there. Conditional updates or transactional constraints work across all app instances, not just one JVM.
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