Question:
In two-phase locking (2PL), a transaction must be _______ .
In two-phase locking (2PL), a transaction must be _______ .
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The two-phase locking protocol ensures serializability and prevents deadlocks by enforcing a strict order in acquiring and releasing locks.
Updated On: Jun 16, 2025
- Release all locks before acquiring new ones
- Acquire all locks before releasing any
- Use only shared locks
- Avoid deadlocks by timeouts
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The Correct Option is B
Solution and Explanation
Two-phase locking protocol requires that a transaction must acquire all locks before releasing any. This ensures that the transaction follows the "growing phase" and "shrinking phase," which are essential for preventing deadlocks.
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