Importance of Data Models in Database Design
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Questions and Answers

What is the primary purpose of data models according to the text?

  • To provide graphical representations of data
  • To transform data into information
  • To facilitate interaction among different stakeholders (correct)
  • To manage the company's data

    • What does the text say about the importance of data modeling?

  • It is not very important for database design
  • It is only useful for large enterprises
  • It can foster improved understanding of the organization (correct)
  • It is mainly a communication tool for programmers

    • How do different managers view the company's data?

  • They all have the same enterprise-wide view
  • They view data differently based on their personal preferences
  • They only care about data relevant to their daily tasks
  • They have restricted views based on their department (correct)

    • What does the text say about the company president's view of the data?

    <p>The president has a universal view to tie the company's divisions together</p> Signup and view all the answers

    What is the relationship between data and information?

    <p>Data is transformed into information by applications</p> Signup and view all the answers

    What does the text say about the nature of this blueprint?

    <p>It is both narrative and graphical in nature</p> Signup and view all the answers

    What do methods in a class represent?

    <p>Real-world actions</p> Signup and view all the answers

    In object-oriented terms, what do methods define?

    <p>Object behavior</p> Signup and view all the answers

    What is the purpose of Unified Modeling Language (UML) class diagrams?

    <p>To depict object-oriented data models</p> Signup and view all the answers

    What does the 'M' indicate next to the LINE object in the UML class diagram?

    <p>Multiple relationships</p> Signup and view all the answers

    What is the significance of the '1' next to the CUSTOMER object in UML class diagrams?

    <p>Each INVOICE is related to only one CUSTOMER</p> Signup and view all the answers

    How are object classes and relationships represented in UML class diagrams?

    <p>Through symbols and diagrams</p> Signup and view all the answers

    Which of the following is NOT a reason why identifying and documenting business rules is essential to database design?

    <p>It enables designers to optimize query performance</p> Signup and view all the answers

    What does a noun in a business rule typically translate to in a data model?

    <p>An entity</p> Signup and view all the answers

    What does the text suggest about the nature of relationships in a data model?

    <p>Relationships are bidirectional</p> Signup and view all the answers

    Which of the following statements is true about the role of business rules in database design?

    <p>Business rules help designers create a centralized view of data</p> Signup and view all the answers

    What does the text suggest about the relationship between business rules and data models?

    <p>Data models are derived from business rules</p> Signup and view all the answers

    What is a potential benefit of identifying and documenting business rules?

    <p>It can serve as a communication tool between users and designers</p> Signup and view all the answers

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