INSY 3304 Quiz 4

From a structural point of view, 3NF is better than _____.

2NF

A table that is in 2NF and contains no transitive dependencies is said to be in _____.

3NF

Some very specialized applications may require normalization beyond the _____.

4NF

To generate a surrogate key, Microsoft Access uses a(n) _____ data type.

AutoNumber

Normalization purity is often easy to sustain in the modern database environment.

False

A table is in fourth normal form if it is in third normal form and has no independent multivalued dependencies.

True

Denormalization produces a lower normal form.

True

In order to meet performance requirements, portions of the database design may need to be occasionally denormalized.

True

It is possible for a table in 2NF to exhibit transitive dependency, where the primary key may rely on one or more nonprime attributes to functionally determine other nonprime attributes.

True

The combination of normalization and ER modeling yields a useful ERD, whose entities can be translated into appropriate table structures.

True

The objective of normalization is to ensure that each table conforms to the concept of well-formed relations.

True

BCNF can be violated only if the table contains more than one _____ key.

candidate

A table is in 4NF if it is in 3NF, and _____.

it has no multivalued dependencies

In a _____ situation, one key determines multiple values of two other attributes and those attributes are independent of each other.

multivalued dependency

The most likely data type for a surrogate key is _____.

numeric

Dependencies based on only a part of a composite primary key are known as _____ dependencies.

partial

If a table has multiple candidate keys and one of those candidate keys is a composite key, the table can have _____ based on this composite candidate key even when the primary key chosen is a single attribute.

partial dependencies

A _____ derives its name from the fact that a collection of multiple entries of the same type can exist for any single key attribute occurrence.

repeating group

A relational table must not contain a(n) _____.

repeating group

When a table contains only one candidate key, _____ are considered to be equivalent.

the 3NF and the BCNF