Computer Systems: A Programmer's Perspective (3rd Edition)
3rd Edition
ISBN: 9780134092669
Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron
Publisher: PEARSON
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Chapter 7, Problem 7.11HW
This program header in Figure 7.14 indicates that the data segment occupies 0x230 bytes in memory. However only the first 0x228 bytes of these come from the sections of the executable file. What causes this discrepancy?
Figure 7.14 Program header table for the example executable prog. off: offset in Object file; vaddr/paddr: memory address; align: alignment requirement; filesz: segment size in object file; mersz: segment size in memory; flags: run-time permissions.
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Question 2
Write a C program which creates two child alternatively and print it on screen.
processes. One of the child processes must
open data1.txt and fill it with 10 random Sample Run
data files and read one data from each file
integers (0-9). The other child process must $/question2
open data2.txt and fill it with 10 random PARENT) Child process ID: 5379
letters (a-z). In the meanwhile, parent must CHILD1] wrote: 6 2 8 6 7 3 3 1 8 4 to
print both child processes' id's and wait for CHILD2] Wrote: f y nhjw xkpm to
them to finish. Then, it must open both file.
[PARENT] Child process ID: 5378
file.
[PARENT] 6 f 2 y 8 n 6 h 7 j 3 w 3 x 1 k
8 p 4 m
You are implementing a simple file system for an operating system for managing files and folders; similar to Windows or UNIX. Your design should follow the following guidelines
i) The entire file system is represented by an object which is the reference to the root folder
ii) Any folder in the file system may contain two types of items, folders (subfolder) and files and you want to treat both in the same way
iii) possible operations: getName, getPermission, listItem
(1 point) What is the most appropriate design pattern?
Contiguous Memory Allocation Algorithms
The program will read size of free memory partitions and size of processes from a text file and then will try to allocate a memory partition for each process using the first-fit, best-fit and worst-fit allocation algorithms.
The implementation completed in Python programming language.
The first line of the input file should contain the size of free memory partitions (in order) while the second line contains the size of processes (in order). Sample input file is shown below:
300,600,350,200,750,125
115,500,358,200,375
The program should read the name input file as command line input and produce a text file named “output.txt” with the following example output:
First-Fit Memory Allocation
-----------------------------------------------------------------------------------------------
start => 300 600 350 200 750 125
115 => 115* 185 600 350 200 750 125
500 => 115* 185 500* 100 350 200 750 125
358…
Chapter 7 Solutions
Computer Systems: A Programmer's Perspective (3rd Edition)
Ch. 7.5 - Prob. 7.1PPCh. 7.6 - Practice Problem 7.2 (solution page 718) In this...Ch. 7.6 - Practice Problem 7.3 (solution page 718) Let a and...Ch. 7.7 - Prob. 7.4PPCh. 7.7 - Prob. 7.5PPCh. 7 - This problem concerns the m. o module from Figure...Ch. 7 - Without changing any variable names, modify bar5.c...Ch. 7 - Prob. 7.8HWCh. 7 - Consider the following program, which consists of...Ch. 7 - Let a and b denote object modules or static...
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