1. Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:
A. A → B.
B. A → C.
C. A → (B,C).
D. (B,C) → A.
2. The different classes of relations created by the technique for preventing modification anomalies are called:
A. normal forms.
B. referential integrity constraints.
C. functional dependencies.
D. None of the above is correct.
3. A relation is in this form if it is in BCNF and has no multivalued dependencies:
A. second normal form.
B. third normal form.
C. fourth normal form.
D. domain/key normal form.
4. Row is synonymous with the term:
5. The primary key is selected from the:
A. composite keys.
C. candidate keys.
D. foreign keys.