Optimal Page Replacement Algorithm Multiple Choice Questions and Answers (MCQs)

This set of Data Structures & Algorithms Multiple Choice Questions & Answers (MCQs) focuses on “Optimal Page Replacement Algorithm”.

1. __________ has the lowest fault rate of all the page replacement algorithms.
a) Optimal page replacement algorithm
b) LRU replacement algorithm
c) FIFO
d) Counting based
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2. Optimal page replacement algorithm is also called as __________
a) LIFO
b) NRU
c) Clairvoyant replacement algorithm
d) Page buffering
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3. In a optimal page replacement algorithm, when a page is to be replaced, which of the following pages is chosen?
a) Oldest page
b) Newest page
c) Frequently occurred page in the future
d) Not frequently occurred page in the future
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4. A page that is not going to be used for the next 7 seconds will be swapped out over a page that is going to be used within the next 0.7 seconds.
a) True
b) False
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5. Analysis of the optimal paging problem has been done through___________
a) Deterministic algorithm
b) Online algorithm
c) Euclid algorithm
d) Optimal algorithm
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6. Optimal page replacement algorithm is implemented in __________
a) General-purpose operating system
b) Special-purpose operating system
c) In any kind of operating system
d) In Windows only
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7. Optimal page replacement algorithm is said to satisfy __________
a) Online algorithm
b) Stack algorithm
c) Queue algorithm
d) Array algorithm
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8. In a stack algorithm, the set of pages in a k-frame memory is always a subset of pages in a __________ frame memory.
a) k-1
b) k
c) k+1
d) k(k+1)
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9. When all software that runs on a system is known beforehand, optimal page replacement algorithm can be used in a general-purpose operating system.
a) True
b) False
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10. 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 3. Calculate the number of page faults using optimal page replacement algorithm.
a) 10
b) 9
c) 8
d) 7
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11. 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
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12. 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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