the-relational-model-and-normalization database question and answers -Page 3

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The Relational Model and Normalization problems

1. 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

Correct Answer: True

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

Correct Answer: True

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

Correct Answer: False

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

Correct Answer: False

5. Keys made up of two or more attributes are called composite keys.
Options
A. True
B. False

Correct Answer: True

6. A functional dependency is a relationship between or among attributes.
Options
A. True
B. False

Correct Answer: True

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

Correct Answer: False

8. A relation is a two-dimensional table.
Options
A. True
B. False

Correct Answer: True

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

Correct Answer: True

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

Correct Answer: True

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