Briefly discuss deferred database modification technique. <То, А, 950> <То, В, 2050> (c) <То, А, 950> <То, В, 2050> <То, А, 950> <То, В, 2050» (а) (b) Add lock and unlock instructions to transactions T1 and T2, so that they observe the two- phase locking protocol. Can the execution of these transactions result in a deadlock? Above is the scenario as it appears at three instances of time. Assume that crash has been occurred what the system supposed to do in all three situations.

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