4. The following is the memory configuration at a given point in time where dynamic partitioning scheme is used. The shaded areas indicate memory spaces already allocated to other processes, while the white spaces are holes (free memory spaces). The next FOUR (4) memory requests are 30M, followed by 50M, 20M and 40M (in order). Shade and indicate clearly which memory block will be allocated to each request using the first- fit and next-fit placement algorithms. (First-fit) 20M (Best-fit) 20M (Next-fit) 20M 80M 80M 20M 80M 20M (X is the lastest allocated block) 20M 50M 50M 50M 10M 10M 10M X 30M 30M 30M

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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4. The following is the memory configuration at a given point in time where dynamic
partitioning scheme is used. The shaded areas indicate memory spaces already allocated
to other processes, while the white spaces are holes (free memory spaces). The next
FOUR (4) memory requests are 30M, followed by 50M, 20M and 40M (in order). Shade
and indicate clearly which memory block will be allocated to each request using the first-
fit and next-fit placement algorithms.
(First-fit)
20M
(Best-fit)
20M
(Next-fit)
20M
80M
1
2
3
4
80M
80M
b. Given a process segment table as follows:
Segment
0
(X is the lastest allocated block)
20M
Base
496
1202
232
2359
1877
20M
20M
Length
691
85
198
109
258
50M
50M
50M
10M
10M
10M
X
30M
30M
30M
Explain the basic use of segment table in process segmentation and its difference with
paging. Give one example on how the information in the given process segment table
is used.
Transcribed Image Text:4. The following is the memory configuration at a given point in time where dynamic partitioning scheme is used. The shaded areas indicate memory spaces already allocated to other processes, while the white spaces are holes (free memory spaces). The next FOUR (4) memory requests are 30M, followed by 50M, 20M and 40M (in order). Shade and indicate clearly which memory block will be allocated to each request using the first- fit and next-fit placement algorithms. (First-fit) 20M (Best-fit) 20M (Next-fit) 20M 80M 1 2 3 4 80M 80M b. Given a process segment table as follows: Segment 0 (X is the lastest allocated block) 20M Base 496 1202 232 2359 1877 20M 20M Length 691 85 198 109 258 50M 50M 50M 10M 10M 10M X 30M 30M 30M Explain the basic use of segment table in process segmentation and its difference with paging. Give one example on how the information in the given process segment table is used.
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