Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 9, Problem 6P
a)
Program Plan Intro
Maintenance:
- When the system becomes operational the requirements of the user gets changed.
- Based on the requirement change request made by the end user the requirement of the system gets changed at the maintenance phase.
- The changes that are made requires maintenance activities and that are categorized in three following ways they are:
- Corrective maintenance:
- It is the maintenance that is made in response with system errors.
- Adaptive maintenance:
- It is the maintenance that is made when there is a change in the business environment.
- Perfective maintenance:
- It is the maintenance activity that is made when the system needs to be enhanced.
- Corrective maintenance:
b)
Program Plan Intro
Maintenance:
- When the system becomes operational the requirements of the user gets changed.
- Based on the requirement change request made by the end user the requirement of the system gets changed at the maintenance phase.
- The changes that are made requires maintenance activities and that are categorized in three following ways they are:
- Corrective maintenance:
- It is the maintenance that is made in response with system errors.
- Adaptive maintenance:
- It is the maintenance that is made when there is a change in the business environment.
- Perfective maintenance:
- It is the maintenance activity that is made when the system needs to be enhanced.
- Corrective maintenance:
c)
Program Plan Intro
Maintenance:
- When the system becomes operational the requirements of the user gets changed.
- Based on the requirement change request made by the end user the requirement of the system gets changed at the maintenance phase.
- The changes that are made requires maintenance activities and that are categorized in three following ways they are:
- Corrective maintenance:
- It is the maintenance that is made in response with system errors.
- Adaptive maintenance:
- It is the maintenance that is made when there is a change in the business environment.
- Perfective maintenance:
- It is the maintenance activity that is made when the system needs to be enhanced.
- Corrective maintenance:
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My daughter is a Girl Scout and it is time for our cookie sales. There are 15 neighbors nearby and she plans to visit every neighbor this evening. There is a 40% likelihood that someone will be home. If someone is home, there is an 85% likelihood that person will make a purchase. If a purchase is made, the revenue generated from the sale follows the Normal distribution with mean $18 and standard deviation $5.
Using @RISK, simulate our door-to-door sales using at least 1000 iterations and report the expected revenue, the maximum revenue, and the average number of purchasers. What is the probability that the revenue will be greater than $120?
Q4 For the network of Fig. 1.41:
a- Determine re
b- Find Aymid
=VolVi
=Vo/Vi
c- Calculate Zi.
d- Find Ay
smid
e-Determine fL, JLC, and fLE
f-Determine the low cutoff frequency.
g- Sketch the asymptotes of the Bode plot defined by the cutoff frequencies of part (e).
h-Sketch the low-frequency response for the amplifier using the results of part (f).
Ans: 28.48 2, -72.91, 2.455 KS2, -54.68, 103.4 Hz. 38.05 Hz. 235.79 Hz. 235.79 Hz.
14V
15.6ΚΩ
68kQ
0.47µF
Vo
0.82 ΚΩ
V₁
B-120
3.3kQ
0.47µF
10kQ
1.2k0
=20µF
Z₁
Fig. 1.41 Circuit for
a. [10 pts] Write a Boolean equation in sum-of-products canonical form for the truth table
shown below:
A
B
C
Y
0
0
0
1
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
1
1
0
1
0
1
1
1
1
0
1
1
0
a. [10 pts] Minimize the Boolean equation you obtained in (a).
b. [10 pts] Implement, using Logisim, the simplified logic circuit. Include an image of
the circuit in your report.
Chapter 9 Solutions
Database Systems: Design, Implementation, & Management
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