Describe conceptual data modeling. How is it used? Describe the ...

[fahad]

Describe conceptual data modeling. How is it used? Describe the process.
 
  What will be an ideal response?

Question 2

One purpose of database design is to structure the data in stable structures, called normalized tables, that are not likely to change over time and that have minimal ________.
 
  A) Data
  B) Space
  C) Redundancy
  D) Columns

[amy.lauersdorf90]

Answer to Question 1

A conceptual data model is a representation of organizational data. The purpose of a conceptual data model is to show as many rules about the meaning and interrelationships among data as possible. Analysts develop (or use from prior systems development) a conceptual data model for the current system and then build or refine a purchased conceptual data model that supports the scope and requirements for the proposed or enhanced system. The process of conceptual data modeling begins with developing a conceptual data model for the system being replaced, if a system already exists. Then, a new conceptual data model is built (or a standard one is purchased) that includes all of the data requirements for the new system.

Answer to Question 2

C