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Home ‣ Database ‣ Object-Oriented Data Modeling See What Others Are Saying!
  • Question

  • Aggregation is which of the following?


  • Options
  • A. Expresses a part-of relationship and is a stronger form of an association relationship.
  • B. Expresses a part-of relationship and is a weaker form of an association relationship.
  • C. Expresses an is-a relationship and is a stronger form of an association relationship.
  • D. Expresses an is-a relationship and is a weaker form of an association relationship.

  • Correct Answer
  • Expresses a part-of relationship and is a stronger form of an association relationship. 

    • More questions

    • 1. During logical database design, the conceptual data model is transformed into a logical data model which describes the data in terms of a specific data management technology.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Database administration refers to a function that applies to the entire organization.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Backward recovery is used to reverse the changes made by transactions that have aborted, or terminated abnormally.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. To build a data warehouse and develop business intelligence applications, it is important that an organization build and maintain a comprehensive repository.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. When assessing the table structure of an acquired set of tables with data, determining functional dependencies is (part of) the:

    • Options
    • A. first step.
    • B. second step.
    • C. third step.
    • D. fourth step.
      • Discuss
    • 6. In UML, a class is represented by a rectangle with three compartments separated by vertical lines.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. With concurrent processing involving updates, a database with concurrency control will be compromised due to interference between users.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. XSL is a language used to develop style sheets from XML documents.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. An ordered collection of elements of the same type are called sets.

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

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