Data Modeling Test Set 1

A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance.

An entity class is a collection of entities and is described by the structure of the entities in that class.

Relationship classes are associations between entity classes.

An identifier typically uses more than one attribute.

An identifier determines the type of relationship that an entity has.

A recursive relationship is a relationship between an archetype and an instance of that archetype.

1:1, 1:N and N:M relationships are also known as HAS-A relationships.

In a 1:N relationship, the parent is the entity on the one side of the relationship and the child is the entity on the N side of the relationship.

Entities use identifiers while tables use keys.

Composite identifiers consist of two or more attributes.