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Home ‣ Database ‣ Data Modeling with ER Model Comments
  • Question

  • An entity class is a collection of entities and is described by the structure of the entities in that class.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Data Modeling with ER Model problems

    Search Results

    • 1. A subtype entity is a special case of another entity called a supertype entity.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A recursive relationship is a relationship between an archetype and an instance of that archetype.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. An identifier determines the type of relationship that an entity has.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The degree of a relationship refers to the number of entity classes in the relationship.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. An attribute describes the entity's characteristics.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A view that contains a computed column can be easily updated.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Views can be used to show the results of computed columns.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Common types of SQL CHECK constraints include range checks and limiting columns values.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The SQL DELETE statement is used to delete both the table structure and table data.

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

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