Exam 4: Entity Relationship (ER)Modeling

Attributes are types of entities.

The associative entity is also known as a ____ entity.

Software vendors have adopted the Chen representation because of its compact representation.

____ might be represented with a multivalued attribute.

The ER model refers to a specific table row as an entity occurrence.

A person's social security number would be an example of a(n)____________________ attribute.

Ideally,an entity identifier is composed of ____ attribute(s).

____________________ are characteristics of entities.

Explain single-valued attributes and provide an example.Is an attribute that is single-valued always simple? Why or why not? Use an example to illustrate your point.

A weak entity must be ____________________-dependent.

The ____ attribute(s)make up the primary key in the table definition: CLASS (CRS_CODE,CLASS_SECTION,CLASS_TIME,CLASS_ROOM,PROF_NUM)

The Crow's foot symbol with two parallel lines indicates ____ cardinality.

____ relationships are most common.

Relationships operate only in one direction.

A(n)____ entity is composed of the primary keys of each of the entities to be connected.

An ERM is dependent on the database type.

A ____ identifier is composed of more than one attribute.

A ____ attribute can be further subdivided to yield additional attributes.

Making sure all ____ are identified is a very important part of a database designer's job.

A relationship is an association between ____.