Database Management: The Physical Model
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Questions and Answers

What is the conceptual model also known as?

  • Physical schema
  • Conceptual schema (correct)
  • Internal schema
  • Logical design

    • Which model represents a global view of the entire database by the entire organization?

  • Physical model
  • Logical model
  • ER model
  • Conceptual model (correct)

    • What does the term 'logical design' refer to in the context of database systems?

  • Implementing the physical schema
  • Physical implementation of the database
  • Defining the internal schema
  • Creating a conceptual data model (correct)

    • Which model provides a macro-level view of the data environment?

    <p>Conceptual model</p> Signup and view all the answers

    In database design, what does 'software and hardware independent' refer to?

    <p>Logical independence</p> Signup and view all the answers

    Which model is the most widely used conceptual model according to the text?

    <p>ER model</p> Signup and view all the answers

    In database management, which model operates at the lowest level of abstraction?

    <p>Physical model</p> Signup and view all the answers

    What is a characteristic of the physical model in databases?

    <p>It requires both hardware and software definitions.</p> Signup and view all the answers

    When can you achieve physical independence in database design?

    <p>When changing the physical model doesn't impact the internal model.</p> Signup and view all the answers

    What type of diagrams are associated with the conceptual model in database design?

    <p>High end-user views diagrams</p> Signup and view all the answers

    Which modeling aspect involves describing the way data is saved on storage media?

    <p>Physical model</p> Signup and view all the answers

    Where does the internal schema fall in terms of degree of abstraction?

    <p>Low abstraction</p> Signup and view all the answers

    What is the external model?

    <p>A representation of the end users' view of the data environment</p> Signup and view all the answers

    How do end users usually operate in relation to the external model?

    <p>With a focus on specific business units</p> Signup and view all the answers

    What is used to represent the external views in the text?

    <p>ER diagrams</p> Signup and view all the answers

    Which term is used for a specific representation of an external view in the text?

    <p>External schema</p> Signup and view all the answers

    What does the external model provide a view of?

    <p>The end users' perspective</p> Signup and view all the answers

    In what form are external models typically represented?

    <p>ER diagrams</p> Signup and view all the answers

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