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Home ‣ Database ‣ ER Model and Business Rules Comments
  • Question

  • Generalization is the process of defining more general entity types from a set of more specialized entity types.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • ER Model and Business Rules problems

    Search Results

    • 1. An entity instance of a subtype represents the same entity instance of a supertype.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. An action assertion is a statement that expresses some aspect of the static structure of the organization.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. An ERD that has had the entities clustered will display more entities.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Action assertions have traditionally been implemented within an application program.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. An entity cluster is a set of one or more entity types and associated relationships.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. In general, larger block sizes are used for online transaction processing applications and smaller block sizes are used for databases with a decision support or data warehousing system.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The three newest database architectures in use today are relational, multidimensional and hierarchical.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. A bitmap index is an index on columns from two or more tables that come from the same domain of values.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Hashing algorithm converts a primary key value into a record address.

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

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