1. The lowest normal form that the relational model supports is

a. the first normal form.

b. the second normal form.

c. the third normal form.

d. the Boyce-Codd normal form (BCNF).

2. ____________ is an index specified on the ordering key field of an ordered file of records.

a. Secondary index

b. Primary index

c. Clustering index

d. Multi-level index

3, The higher normalized relational database schema implies

a less insertion anomalies

b. less deletion anomalies

c. less modification anomalies

d. all of a., b., and c.