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Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Calculate the number of page faults using optimal page replacement algorithm.

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Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Calculate the number of page faults using optimal page replacement algorithm.

(a) 7

(b) 9

(c) 8

(d) 6

This question was addressed to me during an online exam.

This question is from Page Replacement Algorithms topic in portion Page Replacement Algorithms of Data Structures & Algorithms II

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The correct option is (c) 8

For explanation: For the given reference string, the number of page faults using optimal page replacement algorithm is said to be 8. It is solved in the given diagram.

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