Assume in a Virtual Memory system, a program needs 10 pages with page numbers 0 to 9 and each page is 4  words and the program is allocated 3 page frames: a, b, and c. The word trace for 26 memory accesses by the program  are listed below. Use a table similar to the one shown on Slide 7 of Lesson 20 to compare the three replacement  policies: LRU, OPTimal, and FIFO, by calculating and comparing the hit rate of each policy for these 26 memory  accesses.  Word trace: 0, 1, 2, 3, 8, 16, 17, 4, 5, 6, 7, 9, 10, 11, 12, 8, 9, 10, 28, 29, 30, 4, 5, 12, 4, 5

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Assume in a Virtual Memory system, a program needs 10 pages with page numbers 0 to 9 and each page is 4 
words and the program is allocated 3 page frames: a, b, and c. The word trace for 26 memory accesses by the program 
are listed below. Use a table similar to the one shown on Slide 7 of Lesson 20 to compare the three replacement 
policies: LRU, OPTimal, and FIFO, by calculating and comparing the hit rate of each policy for these 26 memory 
accesses. 
Word trace: 0, 1, 2, 3, 8, 16, 17, 4, 5, 6, 7, 9, 10, 11, 12, 8, 9, 10, 28, 29, 30, 4, 5, 12, 4, 5

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