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GATE | GATE-CS-2017 (Set 2) | Question 64

Two transactions T1 and T2 are given as:

T1: r1(X)w1(X)r1(Y)w1(Y)

T2 : r2(Y)w2(Y)r2(Z)w2(Z)

where ri(V) denotes a read operation by transaction Ti on a variable V and wi(V) denotes a write operation by transaction Ti on a variable V. The total number of conflict serializable schedules that can be formed by T1 and T2 is ______ 

Note: This question appeared as Numerical Answer Type.

(A)

54

(B)

55

(C)

56

(D)

57

Answer

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