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Home ‣ Database ‣ Logical Database Design See What Others Are Saying!
  • Question

  • When mapping a binary many-to-many relationship into a relation which of the following is true?


  • Options
  • A. One relation is created.
  • B. Two relations are created.
  • C. Three relations are created.
  • D. Four relations are created.

  • Correct Answer
  • Three relations are created. 

    • More questions

    • 1. A updatable view has its own data.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Well-structured relations encourage anomalies of data.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Entity instances are associated by relationship classes.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Composite identifiers consist of two or more attributes.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Queries that do full table scans should be avoided.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The World Wide Web Consortium (W3C) is the chief standards body for HTTP and HTML.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. MySQL is pronounced "my See-quel."

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The data model produced from the reverse engineering process does not include intersection table data.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The DBMS ranked as being the "hardest to use" in the text is Microsoft's SQL Server.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Three types of triggers are: BEFORE, AFTER and EXCEPTION.

    • Options
    • A. True
    • B. False
      • Discuss

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