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Home ‣ Database ‣ Data Modeling with ER Model See What Others Are Saying!
  • Question

  • Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?


  • Options
  • A. Supertype entity
  • B. Subtype entity
  • C. Archetype entity
  • D. Instance entity

  • Correct Answer
  • Archetype entity 

    • More questions

    • 1. 'dbo' stands for database object.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. SQL is a data sublanguage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Which one of the following symbols is not used in an ERD?

    • Options
    • A. Rectangle
    • B. Oval
    • C. Diamond
    • D. Circle
      • Discuss
    • 4. Data in operational systems are typically fragmented and inconsistent.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. VBScript is similar to JavaScript.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Successful data warehousing requires that a formal program in total quality management (TQM) be implemented.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The source of the data is sometimes called the system of record.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. All primary keys are required.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Entities use identifiers while tables use keys.

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

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