Question

In: Computer Science

Question: In the context of EER data modeling, one can represent entities using superclasses and subclasses....

Question: In the context of EER data modeling, one can represent entities using superclasses and subclasses.

I. Using your own model, explain why one would want to introduce the concepts of superclasses and subclasses into an EER model? CR[10 Marks ]

II. Describe and illustrate using the model in question (I) the process of attribute inheritance. EV[5 Marks]

III. With the model in question (I) describe and contrast the process of specialization with the process of generalization. CR[5 Marks ]

IV. Modify the model to describe the two main constraints that apply to a specialization/generalization relationship.

CR[ 5 Marks ]

Solutions

Expert Solution

venereology answered 10 months ago
Next > < Previous

Related Solutions

Database Design In the EER modeling process, what does inheritance mean? Give one specific example of...
Database Design In the EER modeling process, what does inheritance mean? Give one specific example of it.
Inheritance - Polymorphism One advantage of using subclasses is the ability to use polymorphism. The idea...
Inheritance - Polymorphism One advantage of using subclasses is the ability to use polymorphism. The idea behind polymorphism is that several different types of objects can have the same methods, and be treated in the same way. For example, have a look at the code we’ve included for this problem. We’ve defined Shape as an abstract base class. It doesn’t provide any functionality by itself, but it does supply an interface (in the form of .area() and .vertices() methods) which...
Data Modeling question: model a personal lending app where Borrowers can request loan amounts, Lenders can...
Data Modeling question: model a personal lending app where Borrowers can request loan amounts, Lenders can offer Loans that are either amortized, installment-based, or interest-based, Borrowers can accept or reject loan offers, and the app tracks the principal, balance and payments made or missed.
Question 2 Dummy variables can be used to represent categorical data ___ a) only when the...
Question 2 Dummy variables can be used to represent categorical data ___ a) only when the categorical data is used as a response variable b) only when the categorical data is used as an explanatory variable c) when the categorical is used as either the response or explanatory variable d) Dummy variables can never be used to represent categorical data Question 3 Consider the following OLS regression equation: predicted y = b0 + b1X1 + b2d. The "X1" refers to...
QUESTION ONE The data below represent statistics and probability end of semester examination marks of 30...
QUESTION ONE The data below represent statistics and probability end of semester examination marks of 30 students randomly selected from the population of students who registered for probability and statistics during 2018/2019 academic year. 16 51 36 45 23 48 37 19 28 28 25 36 76 22 27 18 28 42 38 47 44 29 37 42 27 33 35 46 28 27 Using sturge’s approximation rule with all your answers in one decimal place, construct a frequency distribution...
Q1. Use the below Scenario to draw the context and level-0 data flow diagrams that represent...
Q1. Use the below Scenario to draw the context and level-0 data flow diagrams that represent the video rental system. (30 points for context diagram, and 70 points for level-0 diagram) Note: Make sure you include all the appropriate external entities, Processes, Data Stores, and Data Flows. Customer and manager are dealing with a video rental store system. Every time the customer requests to rent a video, he/she needs to enter this request to the system, and the system stores...
Financial modeling question. One of the clients is a large manufacturing firm. The firm is expected...
Financial modeling question. One of the clients is a large manufacturing firm. The firm is expected a strong level of sales growth which will lead to a higher net profit margin and will require an increase in new warehouses and new distribution centers. The firm's average collection period (ACP) will not be affected. The manufacturing firm's CEO comments. "Due to higher expected profitability, our shareholders will likely expect a larger dividend. Therefore, we should increase our payout ratio." Would this...
Financial modeling question. One of the clients is a large manufacturing firm. The firm is expected...
Financial modeling question. One of the clients is a large manufacturing firm. The firm is expected a strong level of sales growth which will lead to a higher net profit margin and will require an increase in new warehouses and new distribution centers. The firm's average collection period (ACP) will not be affected. The manufacturing firm's CEO comments. "Due to higher expected profitability, our shareholders will likely expect a larger dividend. Therefore, we should increase our payout ratio." Would this...
In the context of the amount of credit that one can obtain, which of the following...
In the context of the amount of credit that one can obtain, which of the following is currently the most commonly used credit scoring system? options: The Fair, Isaac and Company scale The semantic differential scale The Likert scale The provisional rating scale
Question 2 XBRL is all about the following except A. Electronic tagging of Data B. Modeling...
Question 2 XBRL is all about the following except A. Electronic tagging of Data B. Modeling business information in a form understandable by a computer application C. XML vocabulary for business operations and financial reporting D. A language that produces a different format for different users Question 3 Extract and Trim Features A. Keeps the null values B. Align the financial statement of the two companies side by side C. Facilitates the financial ratios calculation of the two companies D....
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT