GATE | GATE-CS-2014-(Set-1) | Question 65

Consider the following four schedules due to three transactions (indicated by the subscript) using read and write on a data item x, denoted by r(x) and w(x) respectively. Which one of them is conflict serializable.

GATECS2014Q39
(A) A
(B) B
(C) C
(D) D


Answer: (D)

Explanation: In option D, there is no interleaving of operations. The option D has first all operations of transaction 2, then 3 and finally 1 There can not be any conflict as it is a serial schedule with sequence 2 –> 3 — > 1

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