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Home ‣ Database ‣ The Relational Model and Normalization Comments
  • Question

  • A functional dependency is a relationship between or among attributes.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • The Relational Model and Normalization problems

    Search Results

    • 1. Keys made up of two or more attributes are called composite keys.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A relation is in 5NF when multivalued dependencies are isolated in their own relation.

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

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A candidate key is a determinant that determines all the other columns is a relation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The functional dependency R ? S means that the value of S can be determined when we are given a value of R.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A primary key is a composite key that was selected to be the main identifier for the relation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A relation is a two-dimensional table.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The only reason for the existence of relations is to store instances of functional dependencies.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Given the functional dependency R ? (S,T) , then it is also true that R ? S.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key.

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

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