QUESTION 30

A 'whole-part relationship' describes an association in which one or more classes make up the parts of a larger whole class. This relationship is also known as an 'aggregation'.

True

False

2 points

QUESTION 31

In a database table, the _______ is a field or column that uniquely identifies a record.

	a.	alternate key
	b.	secondary key
	c.	primary key
	d.	candidate key

2 points

QUESTION 32

A 'compound key' is also known as a __________.

	a.	primary key
	b.	candidate key
	c.	composite key
	d.	none of these

2 points

QUESTION 33

Which of the following means 'not changing during normal operations'.

	a.	entity
	b.	normal
	c.	immutable
	d.	none of these

2 points

QUESTION 34

A(n) _________ is often used to display a subset of data from a table or file.

	a.	attribute
	b.	form
	c.	query
	d.	none of these

2 points

QUESTION 35

A ________ is a symbol (often an *) that means 'all' or 'any'.

	a.	wildcard
	b.	dependency
	c.	batch
	d.	none of these

2 points

QUESTION 36

__________ is the process of designing and creating a set of database tables that satisfies the user' needs and avoids redundancies and anomalies.

	a.	Normalization
	b.	Unification
	c.	Combination
	d.	none of these