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Concurrency control employs various types of locks to manage access to shared resources, ensuring data integrity. The primary types include shared locks, which allow multiple transactions to read a resource but prevent writing, and exclusive locks, which permit only one transaction to read or write a resource. Additionally, read locks and write locks can be used to differentiate between operations, while optimistic and pessimistic locking strategies determine when locks are applied based on expected contention levels. Each type of lock addresses different concurrency scenarios, balancing performance and data consistency.

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5d ago

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