For the schedule given below involving transactions T1 and T2, which of the…

GATE · 1999 · CS · Question 2 subparts

For the schedule given below involving transactions T1 and T2, which of the following is correct?

1. T1: Read(A)
2. T2: Read(B)
3. T1: Write(A)
4. T2: Read(A)
5. T2: Write(A)
6. T2: Write(B)
7. T1: Read(B)
8. T1: Write(B)

  1. A.

    The schedule is serializable and can occur under the 2PL protocol.

  2. B.

    The schedule is serializable but cannot occur under the 2PL protocol.

  3. C.

    The schedule is not serializable but can occur under the 2PL protocol.

  4. D.

    The schedule is not serializable and cannot occur under the 2PL protocol.

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