Assume that the main memory has the following 5 fixed partitions with the following sizes: 100KB, 500KB, 200KB, 300KB and 600KB (in order) Explain the following allocation algorithms: First-fit, Best-fit and Worst-fit. How would each of the First-fit, Best-fit and Worst-fit algorithms place processes of 212KB, 417KB, 112KB and 426KB (in order)? • Compute the total memory size that is not used for each algorithm.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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• Assume that the main memory has the following 5 fixed partitions with the following sizes:
100KB, 500KB, 200OKB, 300KB and 600KB (in order)
• Explain the following allocation algorithms: First-fit, Best-fit and Worst-fit.
• How would each of the First-fit, Best-fit and Worst-fit algorithms place
processes of 212KB, 417KB, 112KB and 426KB (in order)?
Compute the total memory size that is not used for each algorithm.
• Which algorithm makes the efficient use of the memory?
Consider the following Page tables and show the process allocation in main memory
having 19 frame
Process 0
Process 1
process 2
process 3
Frame
Page #
Frame
Page #
Frame
Page #
Frame
page #
1
2
4
5
11
7
2
13
12
3
3
15
3
14
4
10
4
16
5
17
6.
18
Transcribed Image Text:• Assume that the main memory has the following 5 fixed partitions with the following sizes: 100KB, 500KB, 200OKB, 300KB and 600KB (in order) • Explain the following allocation algorithms: First-fit, Best-fit and Worst-fit. • How would each of the First-fit, Best-fit and Worst-fit algorithms place processes of 212KB, 417KB, 112KB and 426KB (in order)? Compute the total memory size that is not used for each algorithm. • Which algorithm makes the efficient use of the memory? Consider the following Page tables and show the process allocation in main memory having 19 frame Process 0 Process 1 process 2 process 3 Frame Page # Frame Page # Frame Page # Frame page # 1 2 4 5 11 7 2 13 12 3 3 15 3 14 4 10 4 16 5 17 6. 18
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