Which of the following schedule is recoverable?
(A) R1(A)R2(B)R2(A)W2(C)C2R3(C)W1(A)C1R3(A)W3(B)C3.
(B) R1(A)W1(A)R2(A)W2(A)C2C1.
(C) R2(A)R2(B)W2(A)W2(C)R3(A)W3(B)W3(C)R1(C)W2(B)R2(C)C2R1(A)W1(C)C1
(D) W1(A)W2(B)W2(C)C2R1(A)W1(B)W2(C)C


Answer: (D)

Explanation: I – R1(A)R2(B)R2(A)W2(C)C2R3(C)W1(A)C1R3(A)W3(B)C3is irrecoverable.
II – R1(A)W1(A)R2(A)W2(A)C2C1is irrecoverable.
III – R2(A)R2(B)W2(A)W2(C)R3(A)W3(B)W3(C)R1(C)W2(B)R2(C)C2R1(A)W1(C)C1 is irrecoverable.
IV – W1(A)W2(B)W2(C)C2R1(A)W1(B)W2(C)C is recoverable.
So, option (D) is correct.

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  • Last Updated : 30 Nov, 2018

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