Java Threading · interview question
A local oversell bug disappears after you add synchronized, but production runs four application instances. What risk remains?
Multiple choiceMediumchapter-15-curatedpremiumjava-threadingsynchronized-locks
Answer and explanation
Correct answer
D. Another JVM instance can still reserve the same stock because the lock is process-local
Why
A JVM lock coordinates threads inside one process only. In a distributed deployment, final correctness must also be enforced at the shared data boundary, such as the database.
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