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Data Modeling - Quiz

Each question is worth one point. Select the best answer or answers for each question.
1. Select the one statement about databases that is not correct.
Please select the best answer.
  A. A data model guides the way that the data elements are organized within the database.
  B. A hierarchical database model organizes data along tree-like, or parent-children, hierarchical chains.
  C. Web sites use databases for searching, cataloging, personalization, automatic site updates, and transaction processing.
  D. When modeling, the larger the grouping of data, the faster will be its speed.

2. Select the one statement below that does not correctly describe the type of data model listed.
Please select the best answer.
  A. Hierarchical databases are based on tree-like, parent/children relationships. They're also called flat file, because there are limits to the flexibility of storing and searching of data.
  B. Network databases are like hierarchical, but the "children" can have multiple "parents." They allow for more flexibility in identifying and searching on relationships across different sets of data.
  C. Relational databases are based on the metaphor of a two-dimensional table consisting of rows and columns. Common fields create the relationships.
  D. Object databases tend to be faster than hierarchical databases.

3. Why must data modeling occur before database development?
Please select the best answer.
  A. So that a database structure will be created that can record and report on the kinds of relationships between data that will be important to the users of the database.
  B. So the development team can design a new database model and implement it with markup language customizations.
  C. So that the technical members of the team will be able to advise on appropriate use of network technologies to transmit the data queries.
  D. So that the surrogate client will be able to check the data model with their accounting team for accuracy of middleware information architecture.

4. Which model offers the greatest flexibility for the decision maker?
Please select the best answer.
  A. Relational
  B. Hierarchical
  C. Object
  D. Network

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