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What is TRUE about Two-phase locking?

15. What is TRUE about Two-phase locking?

1. As long as the transaction is already running, it will try to obtain the required lock in the first part.
2. As long as the transaction is already running, it will try to obtain the required lock in the second part.
3. As long as the transaction is already running, it will try to obtain the required lock in the third part.
4. As long as the transaction is already running, it will try to obtain the required lock in the fourth part.

Answer: A) As long as the transaction is already running, it will try to obtain the required lock in the first part.

Explanation:

As long as the transaction is already running, it will try to obtain the required lock in the first part.