In the two-phase locking protocol, a transaction can release its locks before it has obtained all the locks it needs.Question 4AnswerTrueFalse
Question
In the two-phase locking protocol, a transaction can release its locks before it has obtained all the locks it needs.
Question 4
Answer
- True
- False
Solution
Answer
Statement: In the two-phase locking protocol, a transaction can release its locks before it has obtained all the locks it needs.
Analysis: The two-phase locking (2PL) protocol is a concurrency control method that ensures serializability in database transactions. It consists of two phases:
- Growing Phase: The transaction can acquire locks but cannot release any locks.
- Shrinking Phase: The transaction can release locks but cannot acquire any new locks.
According to the 2PL protocol, a transaction must obtain all the necessary locks before it can begin releasing any of them. Therefore, the statement is not consistent with the definition of the two-phase locking protocol.
Conclusion
The correct answer is False. A transaction cannot release its locks before it has obtained all the locks it needs in the two-phase locking protocol.
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