State which of the following schedules are serializable.
a. r1(x) r2(y) r1(z ) r3(z ) r2(x) r1(y)
b. r1(x) w2(y) r1(z ) r3(z ) w2(x) r1(y)
c. r1(x) w2(y) r1(z ) r3(z ) w1(x) r2(y)
d. r1(x) r2(y) r1(z ) r3(z ) w1(x) w2(y)
e. r1(x) r2(y) w2(x) w3(x) w3(y) r1(y)
f. w1(x) r2(y) r1(z ) r3(z ) r1(x) w2(y)
g. r1(z ) w2(x) r2(z ) r2(y) w1(x) w3(z ) w1(y) r3(x)
a. Yes. all reads
b. No. T1 before T2 on x and after T2 on y
c. Yes
d. Yes
e. No. T1 before T2 and T2 before T3 on x; T2 before T3 and T3 before T1 on y.
f. Yes
g. Yes
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