Fundamentals of Information Systems (Looseleaf)
9th Edition
ISBN: 9781337099042
Author: STAIR
Publisher: Cengage
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Chapter 4, Problem 1PSE
Program Plan Intro
Spreadsheet track of amount of time spend onsocial networking sites and its analysis-based time spent on informative and entertainment purpose.
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Given the following Extended-BNF grammar of the basic mathematical expressions:
Show the derivation steps for the expression: ( 2 + 3 ) * 6 – 20 / ( 3 + 1 )
Draw the parsing tree of this expression.
SEE IMAGE
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.
Chapter 4 Solutions
Fundamentals of Information Systems (Looseleaf)
Ch. 4 - Prob. 1LOCh. 4 - Prob. 2LOCh. 4 - Prob. 3LOCh. 4 - Prob. 4LOCh. 4 - Prob. 5LOCh. 4 - Prob. 6LOCh. 4 - Prob. 7LOCh. 4 - Prob. 8LOCh. 4 - Prob. 9LOCh. 4 - Prob. 10LO
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