{CodeRoyale}
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Multiple ChoiceHard 30s

Optimistic Locking

Optimistic locking typically uses:
Options
  1. 1A row-level FOR UPDATE lock is always acquired before every single update
  2. 2A single in-process mutex guarded by the application server protects the row
  3. 3A version column checked on update to detect concurrent writes
  4. 4A database lock held for the entire duration of the whole HTTP request
backendmcqhard

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