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Author Question: Briefly identify the four entity-relationship diagrams that are produced and analyzed during ... (Read 73 times)

kaid0807

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on: Jul 7, 2018
Briefly identify the four entity-relationship diagrams that are produced and analyzed during conceptual data modeling.
 
  What will be an ideal response?

Question 2

One of the purposes of logical and physical database design is to choose data-storage technologies that will efficiently, accurately, and securely process database activities.
 
  Indicate whether the statement is true or false


lkanara2

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Reply #1 on: Jul 7, 2018
Answer to Question 1

The four entity-relationship diagrams are: (1 ) an entity-relationship diagram that illustrates the data needed in the project's application; (2 ) an entity-relationship diagram for the system being replaced; (3 ) an entity-relationship diagram that illustrates the entire database from which the new application's data are extracted; and (4 ) an entity-relationship diagram for the entire database for the existing application system.
CL

Answer to Question 2

TRUE
Explanation: One of the five purposes of logical and physical design is to determine the data-storage for the database. Databases are often stored on multiple devices along with additional back-up devices.
CL


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