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Home Database The Relational Model and Normalization Comments

  • Question
  • A key is a group of one or more attributes that uniquely identifies a row.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • The Relational Model and Normalization problems


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    • 1. A functional dependency is always an equation.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. Relations are categorized into normal forms according to the referential integrity constraints that they have.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. A relation has cells that hold multi-value entries.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. In a relation, the order of the columns does not matter.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. In a relation, the rows are sometimes called "records."

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. In a relation, the columns are sometimes called "attributes."

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. A ternary relationship is so called because in contains two entities and one association between them.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. In a 1:N relationship, the parent is the entity on the one side of the relationship and the child is the entity on the N side of the relationship.

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


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