Operating system supports different page replacement policy. From the given below option which is not a valid page replacement policy?

Optimal page replacement policy

Operating system supports different page replacement policy. From the

1.	Operating system supports different page replacement policy. From the given below option which is not a valid page replacement policy?
A.	Least Recently Used
B.	First in first out
C.	Currently used policy
D.	Optimal page replacement policy
Answer» D. Optimal page replacement policy

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We have a process that has been allocated 3 page frames and initially none of the pages of the process are available in the memory. The following sequence of page references (reference string) is made by the process : 1, 2, 1, 3, 7, 4, 5, 6, 3, 1If Optimal Page Replacement policy is used,_______ page faults will occur for the above reference string.
We have a process that has been allocated 3 page frames and initially none of the pages of the process are available in the memory. The following sequence of page references (reference string) is made by the process : 1, 2, 1, 3, 7, 4, 5, 6, 3, 1How many page faults will occur for the above reference string with the Least Recently Used(LRU) Page Replacement Policy in comparison to an Optimal Page Replacement policy?
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Operating system supports different page replacement policy. From the given below option which is not a valid page replacement policy?

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