Which of the following concurrency control protocols ensure both conflict serializability and freedom from deadlock ? 1. 2-phase locking 2. Time-stamp ordering

Which of the following concurrency control protocols ensure both confl

1.	Which of the following concurrency control protocols ensure both conflict serializability and freedom from deadlock ? 1. 2-phase locking 2. Time-stamp ordering
A.	1 only
B.	2 only
C.	Both 1 and 2
D.	Neither 1 nor 2
Answer» C. Both 1 and 2

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Which of the following concurrency control protocols ensure both conflict serializability and freedom from deadlock ? 1. 2-phase locking 2. Time-stamp ordering

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