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chapter1
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chapter1

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Questions and Answers

What is the purpose of a DBMS catalog in a database system?

  • To provide a conceptual view of the database
  • To manage the relationships between different entities in the database
  • To store the actual data in the database
  • To store the description of the database such as data structures, types, and constraints (correct)
  • What does program-data independence in a database system allow?

  • It allows programs to directly modify the database contents
  • It imposes restrictions on accessing data from different programs
  • It links programs to specific data structures in the database
  • It enables changing data storage organization without changing the DBMS access programs (correct)
  • Which characteristic of a database system allows users to interact with a conceptual view of the database?

  • Data Abstraction (correct)
  • Insulation between programs and data
  • Self-describing nature
  • Meta-data storage
  • What is meta-data in the context of a database system?

    <p>Description of the database including data structures, types, and constraints</p> Signup and view all the answers

    How do some newer NOSQL systems differ in terms of meta-data handling?

    <p>They eliminate the need for meta-data by not storing any descriptions</p> Signup and view all the answers

    What does insulation between programs and data allow in a database system?

    <p>Changing data structures without affecting access programs</p> Signup and view all the answers

    In the context of a database system, what is meant by 'program-data independence'?

    <p>'Program-data independence' allows changes in storage without affecting access programs</p> Signup and view all the answers

    What is the main role of a data model in a database system?

    <p>To provide a conceptual representation of the data stored in the database</p> Signup and view all the answers

    What does 'Data Abstraction' achieve in a database system?

    <p>Presents users with a conceptual view of the database</p> Signup and view all the answers

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