DBMS Features and Abstractions Quiz
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Questions and Answers

What is the primary purpose of the ANSI-SPARC three-level architecture?

  • To provide a framework for describing general database concepts and structures. (correct)
  • To define a single unified schema for all database applications.
  • To standardize the physical storage format for all database systems.
  • To enforce data and program independence across all database systems.

    • Which of the following is NOT one of the three levels of data abstraction in the ANSI-SPARC architecture?

  • Logical schema (correct)
  • Conceptual schema
  • Internal (physical) schema
  • External schema

    • What is the purpose of the external schema in the ANSI-SPARC architecture?

  • To provide a comprehensive view of the entire database.
  • To represent the logical structure of the database.
  • To provide a user-specific view of the database. (correct)
  • To define the physical storage structure of the database.

    • Which level of the ANSI-SPARC architecture is closest to the physical storage level?

    <p>Internal (physical) schema</p> Signup and view all the answers

    What is the purpose of the conceptual schema in the ANSI-SPARC architecture?

    <p>To provide a comprehensive view of the entire database.</p> Signup and view all the answers

    According to the ANSI-SPARC architecture, which component is responsible for storing the database description (schema)?

    <p>A separate catalog</p> Signup and view all the answers

    Which of the following levels represents the view of the database as seen by individual users?

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

    Which level describes the logical structure of all data in the database and is defined by a Data Definition Language (DDL)?

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

    What is the primary purpose of the Data Definition Language (DDL) used to define the conceptual schema?

    <p>To define the logical structure and constraints of the entire database</p> Signup and view all the answers

    Which of the following statements is true about the role of the external and conceptual levels in database design?

    <p>They help communicate the development process among various users and designers</p> Signup and view all the answers

    What is the primary purpose of the internal level in a database management system?

    <p>To describe the implementation of the conceptual schema using physical storage structures</p> Signup and view all the answers

    Based on the example provided, what data type is used for the sid attribute in the Students table?

    <p>string</p> Signup and view all the answers

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