What is a deadlock in the context of concurrency control?
- A state where a database is locked for maintenance
- A state where a transaction is unable to acquire the necessary locks to proceed
- A state where transactions are executed in parallel without conflicts
- A state where two or more transactions are waiting indefinitely for each other to release locks
A deadlock occurs when two or more transactions are waiting indefinitely for each other to release locks, leading to a situation where none of the transactions can proceed. Deadlocks must be resolved to allow the system to continue processing transactions.
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