ISRO | ISRO CS 2011 | Question 15

What is the equivalent serial schedule for the following transactions?

T1          T2          T3
                       R(Y)
                       R(Z)
R(X)
W(X) 
                       W(Y)
                       W(Z)
           W(Z)
R(Y)
W(Y) 
           R(Y)
           W(Y)
           R(X)
           W(X)                                

(A) T1 − T2 − T3
(B) T3 − T1 − T2
(C) T2 − T1 − T3
(D) T1 − T3 − T2


Answer: (B)

Explanation: From the following precedence graph, T3–>T1–>T2

So, option (B) is correct.

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