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  1. The entity integrity rule states that:

  2. A.

     no primary key attribute may be null.

    B.

     no primary key can be composite.

    C.

     no primary key may be unique.

    D.

     no primary key may be equal to a value in a foreign key.

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  3. When mapping a many-to-many unary relationship into a relation which of the following is true?

  4. A.

     One relation is created.

    B.

     Two relations are created.

    C.

     Three relations are created.

    D.

     Four relations are created.

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  5. If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

  6. A.

     First normal form

    B.

     Second normal form

    C.

     Third normal form

    D.

     Fourth normal form

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  7. A foreign key is which of the following?

  8. A.

     Any attribute

    B.

     The same thing as a primary key

    C.

     An attribute that serves as the primary key of another relation

    D.

     An attribute that serves no purpose

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  9. A transitive dependency is which of the following?

  10. A.

     A functional dependency between two or more key attributes.

    B.

     A functional dependency between two or more nonkey attributes.

    C.

     A relation that is in first normal form.

    D.

     A relation that is in second normal form.

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  11. When mapping a multivalued attribute into a relation which of the following is true?

  12. A.

     One relation is created.

    B.

     Two relations are created.

    C.

     Three relations are created.

    D.

     Four relations are created.

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  13. If no multivalued attributes exist in a relation, then the relation is in what normal form?

  14. A.

     First normal form

    B.

     Second normal form

    C.

     Third normal form

    D.

     Fourth normal form

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  15. A primary key is which of the following?

  16. A.

     Any attribute

    B.

     An attribute that uniquely identifies each row

    C.

     An attribute that uniquely identifies each column

    D.

     A derived attribute

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  17. The relational model consists of:

  18. A.

     data in the form of tables.

    B.

     data redundancy.

    C.

     operations using non-SQL languages.

    D.

     unorganized data.

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  19. When mapping a binary many-to-many relationship into a relation which of the following is true?

  20. A.

     One relation is created.

    B.

     Two relations are created.

    C.

     Three relations are created.

    D.

     Four relations are created.

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