Q64

MCQ2 marks, −0.5

Consider the following schedules involving two transactions. Which one of the following statements is TRUE? $S_1 :r_1(X); r_1(Y); r_2(X); r_2(Y); w_2(Y); w_1(X)$ $S_2 :r_1(X); r_2(X); r_2(Y); w_2(Y); r_1(Y); w_1(X)$

(A)

Both $S_1$ and $S_2$ are conflict serializable.

(B)

$S_1$ is conflict serializable and $S_2$ is not conflict serializable.

(C)

$S_1$ is not conflict serializable and $S_2$ is conflict serializable.

(D)

Both $S_1$ and $S_2$ are not conflict serializable.

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