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?

r1(x); r2(x); w1(x); r3(x); w2(x)

r2(x); r1(x); w2(x); r3(x); w1(x)

r3(x); r2(x); r1(x); w2(x); w1(x)

r2(x); w2(x); r3(x); r1(x); w1(x)

Consider the following four schedules due to three transactions (indic

1.	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); r2(x); r1(x); w2(x); w1(x)
D.	r2(x); w2(x); r3(x); r1(x); w1(x)
Answer» E.

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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?

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