EBK USING MIS
10th Edition
ISBN: 8220103633642
Author: KROENKE
Publisher: YUZU
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Textbook Question
Chapter 1.7, Problem 4ARQ
How can you use the five-component model?
Name and define each of the five components. Explain the symmetry in the five-component model. Show how automation moves work from one side of the five-component structure to the other. Name the most important component and state why it is the most important. Use the five-component model to describe the differences between high-tech and low-tech information systems. Explain how the components are ordered according to difficulty of change and disruption.
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Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command:
Osh> !!
The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command.
Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command:
Osh> ! 3
The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command.
Error handling:
The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."
Activity No.
Activity
Time (weeks)
Immediate Predecessors
1
Requirements collection
3
2
Requirements structuring
4
1
3
Process analysis
3
2
4
Data analysis
3
2
5
Logical design
50
3,4
6
Physical design
5
5
7
Implementation
6
6
c. Using the information from part b, prepare a network diagram. Identify the critical path.
2. UNIX Shell and History Feature [20 points]
This question consists of designing a C program to serve as a shell interface that
accepts user commands and then executes each command in a separate process. A
shell interface gives the user a prompt, after which the next command is entered.
The example below illustrates the prompt osh> and the user's next command:
cat prog.c. The UNIX/Linux cat command displays the contents of the file
prog.c on the terminal using the UNIX/Linux cat command and your program
needs to do the same.
osh> cat prog.c
The above can be achieved by running your shell interface as a parent process.
Every time a command is entered, you create a child process by using fork(),
which then executes the user's command using one of the system calls in the
exec() family (as described in Chapter 3). A C program that provides the general
operations of a command-line shell can be seen below.
#include
#include
#define MAX LINE 80 /* The maximum length command */
{
int…
Chapter 1 Solutions
EBK USING MIS
Ch. 1.4 - Prob. 1AAQCh. 1.4 - Prob. 2AAQCh. 1.4 - Prob. 3AAQCh. 1.4 - Prob. 4AAQCh. 1.7 - Prob. 1EGDQCh. 1.7 - Prob. 2EGDQCh. 1.7 - Prob. 3EGDQCh. 1.7 - Prob. 4EGDQCh. 1.7 - Prob. 5EGDQCh. 1.7 - Prob. 6EGDQ
Ch. 1.7 - Prob. 7EGDQCh. 1.7 - Prob. 8EGDQCh. 1.7 - Prob. 1SGDQCh. 1.7 - Prob. 2SGDQCh. 1.7 - Prob. 3SGDQCh. 1.7 - Prob. 4SGDQCh. 1.7 - Prob. 5SGDQCh. 1.7 - Prob. 1CGDQCh. 1.7 - Prob. 2CGDQCh. 1.7 - Prob. 3CGDQCh. 1.7 - Prob. 4CGDQCh. 1.7 - Prob. 1ARQCh. 1.7 - Prob. 2ARQCh. 1.7 - Prob. 3ARQCh. 1.7 - How can you use the five-component model? Name and...Ch. 1.7 - Prob. 5ARQCh. 1.7 - Prob. 6ARQCh. 1.7 - Prob. 7ARQCh. 1 - Prob. 1.1UYKCh. 1 - Prob. 1.2UYKCh. 1 - Prob. 1.3UYKCh. 1 - Prob. 1.4CE1Ch. 1 - Prob. 1.5CE1Ch. 1 - Prob. 1.6CE1Ch. 1 - Prob. 1.7CE1Ch. 1 - Prob. 1.8CE1Ch. 1 - Prob. 1.9CS1Ch. 1 - Prob. 1.1CS1Ch. 1 - Prob. 1.11CS1Ch. 1 - Prob. 1.12CS1Ch. 1 - Prob. 1.13CS1Ch. 1 - Prob. 1.14CS1Ch. 1 - Prob. 1.15MML
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