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Consider a reference string 1,2,3,2,1,5,2,1,6,2,5,6,3,1,3,6,1,2,4,3 of frame size 3. Calculate the number of page faults using optimal page replacement algorithm.

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Consider a reference string 1,2,3,2,1,5,2,1,6,2,5,6,3,1,3,6,1,2,4,3 of frame size 3. Calculate the number of page faults using optimal page replacement algorithm.

(a) 12

(b) 16

(c) 14

(d) 15

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The correct answer is (c) 14

The best I can explain: For the given reference string, the number of page faults using optimal page replacement algorithm is said to be 14.

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