Consider the LRU page-replacement algorithm. Give a sequenceof page accesses tha
ID: 3611477 • Letter: C
Question
Consider the LRU page-replacement algorithm. Give a sequenceof page accesses that on a system with 4 page frames and 5 pagesresults in a page fault on every access. Show the result of the same sequence when the optimalalgorithm is used. What control flow construct might generate such a sequence? Consider the LRU page-replacement algorithm. Give a sequenceof page accesses that on a system with 4 page frames and 5 pagesresults in a page fault on every access. Show the result of the same sequence when the optimalalgorithm is used. What control flow construct might generate such a sequence?Explanation / Answer
FramesPages
2
1
3
4
7
8
2
3
4
1
2
2
2
2
7
7
7
7
4
2
1
1
1
1
8
8
8
8
3
3
3
3
3
2
2
2
4
4
4
4
4
3
3
F
F
F
F
F
F
F
F
F
Following is the result obtained using optimal algorithm for theabove sequence: 2 1 3 4 3 8 2 3 4
FramesPages
2
1
3
4
7
8
2
3
4
1
2
2
2
2
2
2
2
2
2
2
1
1
1
7
8
8
8
8
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
F
F
F
F
F
F
FramesPages
2
1
3
4
7
8
2
3
4
1
2
2
2
2
7
7
7
7
4
2
1
1
1
1
8
8
8
8
3
3
3
3
3
2
2
2
4
4
4
4
4
3
3
F
F
F
F
F
F
F
F
F
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