Computer Sciences > GATE 2014 SET-3 > Transaction Schedules
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?
A
r₁(x); r₂(x); w₁(x); r₃(x); w₂(x)
B
r₂(x); r₁(x); w₂(x); r₃(x); w₁(x)
C
r₃(x); r₁(x); r₂(x); w₂(x); w₁(x)
D
r₁(x); w₁(x); r₃(x); r₂(x); w₂(x)

Correct : d

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