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Exercise 1: Serializability Checking

Is the following schedule view/conflict serializable? 

T1:        W(B)  W(A)
T2:  R(B)                    W(A)
T3:                    R(A)        W(A)

Is the following schedule view/conflict serializable? 

T1:        W(B)  W(A)
T2:  R(B)              W(A)
T3:                          R(A)  W(A)