EBK COMPUTER SYSTEMS
3rd Edition
ISBN: 8220101459107
Author: O'HALLARON
Publisher: YUZU
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Textbook Question
Chapter 9.8, Problem 9.5PP
Practice Problem 9.5 (solution page 882)
Write a C
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[11:43 PM, 7/23/2022] +254 719 743842: The purpose of this assignment is to learn to develop multi-process programs. You are expected to extend the myshell.c program and add pipelines and I/O redirections. In particular, your shell program should recognize the following:
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Wednesday, Sep 28, 2022
ENGINEERING COMPUTER-SCIENCE
Write a C program to Implement a system of three
processes which read and write numbers to a file.
Each of the three processes P1, P2, and P3 must
obtain an integer from the file (these instructions
must be executed 200 times). The file only holds one
integer at any given time. Given a file F, containing a
single integer N, each process must perform the
following steps
1. Fork two processes
For 200 times:
2. Open F
3. Read the integer N from the file
4. Close F
5. Output N and the process' PID (On the screen)
6. Increment N by 1
7. Open F
8. Write N to F (overwriting the current value in F)
9. Close F
b) Briefly describe why the processes P1, P2, and P3
obtain/read duplicates of numbers (why does a
particular integer x appear in the output of more
than one process)?
Suggest a solution (you do not need to implement it)
√x
8
[PYTHON]
For this programming assignment I want you to write a program that calculates bigram frequencies for a set of text.
Your program should assess the text and calculate the frequency of word pairs that occur throughout the entire file.
Your program should ignore case (meaning "the dog" and "The dog" should count as the same phrase).
Your program should write out the frequency count for each uniquely occurring bigram to a file with the count and the bigram separated by a tab.
As an example, bigram frequencies for the following sentence are:
Sentence: The dog and the cat do not get along because the dog is mean to the cat and the cat is aloof to the dog.
Bigrams:
the cat
3
the dog
3
and the
2
to the
2
along because
1
aloof to
1
because the
1
cat and
1
cat do
1
cat is
1
do not
1
dog and
1
dog is
1
get along
1
is aloof
1
is mean
1
mean to
1
not get
1
Chapter 9 Solutions
EBK COMPUTER SYSTEMS
Ch. 9.2 - Prob. 9.1PPCh. 9.3 - Prob. 9.2PPCh. 9.6 - Prob. 9.3PPCh. 9.6 - Prob. 9.4PPCh. 9.8 - Practice Problem 9.5 (solution page 882) Write a C...Ch. 9.9 - Prob. 9.6PPCh. 9.9 - Prob. 9.7PPCh. 9.9 - Prob. 9.8PPCh. 9.9 - Prob. 9.9PPCh. 9.9 - Prob. 9.10PP
Ch. 9 - Prob. 9.11HWCh. 9 - Repeat Problem 9.11 for the following address....Ch. 9 - Repeat Problem 9.11 for the following address....Ch. 9 - Given an input file hello.txt that consists of the...Ch. 9 - Determine the block sizes and header values that...Ch. 9 - Prob. 9.16HWCh. 9 - Prob. 9.17HWCh. 9 - Prob. 9.18HWCh. 9 - Prob. 9.19HWCh. 9 - Write your own version of malloc and free, and...
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