INFORMATION TECH.PROJECT...-W/MINDTAP
9th Edition
ISBN: 9781337586801
Author: SCHWALBE
Publisher: CENGAGE L
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Expert Solution & Answer
Chapter 6, Problem 2E
a. AOA network diagram:
Explanation of Solution
Draw an Activity on Arrow (AOA) network diagram representing the project given in Table 6.2 of the book. To accomplish the network diagram, follow the following steps:-
1. Put the node numbers 1 to 9 in circles.
2. Find all of the activities that start at node 1. Draw arrows between node 1 and those finish nodes. Put the activity letter and duration estimate on the associated arrow. In this case, Draw an edge from node 1 to 2 and label it as A=2. Label A=2 means activity A has a duration of 2 days.
3. Continue drawing the project network diagram until all activities are included on the diagrams that have dependencies.
4. Label each arrow with the activity letter and estimated time. The below network diagram has 11 arrows corresponding to 11 rows in the table.
- Draw second edge from node 2 to 3 and label it as B=2...
b. All paths on the network diagram:
Explanation of Solution
To identify all the paths on the network diagram, just follow the arrows to identify distinct routes from node 1 to node 9.
To find out length of each path, just add the duration for all activities on that path.
| Path No | Route | Length / Total Duration |
c. Critical path for this project
Explanation of Solution
The longest path in the network diagram is the critical path...
d. Shortest possible time needed to complete this project:
Explanation of Solution
The critical path represents the shortest time requir...
Expert Solution & Answer
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5. Word FrequencyWrite a program that reads the contents of a text file. The program should create a dictio-nary in which the keys are the individual words found in the file and the values are the number of times each word appears. For example, if the word “the” appears 128 times, the dictionary would contain an element with 'the' as the key and 128 as the value. The program should either display the frequency of each word or create a second file containing a list of each word and its frequency.
3.) File Encryption and DecryptionWrite a program that uses a dictionary to assign “codes” to each letter of the alphabet. For example:
codes = { ‘A’ : ‘%’, ‘a’ : ‘9’, ‘B’ : ‘@’, ‘b’ : ‘#’, etc . . .}Using this example, the letter A would be assigned the symbol %, the letter a would be assigned the number 9, the letter B would be assigned the symbol @, and so forth.
The program should open a specified text file, read its contents, then use the dictionary to write an encrypted version of the file’s contents to a second file. Each character in the second file should contain the code for the corresponding character in the first file.
Write a second program that opens an encrypted file and displays its decrypted contents on the screen.
Chapter 6 Solutions
INFORMATION TECH.PROJECT...-W/MINDTAP
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