Question: 1. If a relational database table is in Boyce-Codd normal form, it is also in a. the first normal form. b. the second normal form.

1. If a relational database table is in Boyce-Codd normal form, it is also in

a. the first normal form.

b. the second normal form.

c. the third normal form.

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

2. Which of the following statement(s) is(are) correct?

a. Multi-level index is designed to reduce the search cost of index part with a reduction ratio of logarithm function.

b. Multi-level index is guaranteed to have the search cost proportional to the number of levels inmulti-level index.

c. Both a. and b. are correct.

d. Neither a. nor b. is correct.

3. A join path (or join condition) used for a join operation, in general,

a. represents a relationship inherited from E-R model representation of a database schema.

b involves a primary key and a foreign key.

c. implies a referential integrity constraint.

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

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