Homework 3

Vehicle

In the figure below, to which of the following entities are the entities "CAR" and "TRUCK" generalized?

Patient_Name

In the figure below, which of the following apply to both OUTPATIENTs and RESIDENT_PATIENTs?

Outpatient

In the figure below, which of the following is a subtype of patient?

there are attributes that apply to some but not all instances of an entity type.

Subtypes should be used when:

Partial Specialization

The ________ rule specifies that an entity instance of a supertype is allowed not to belong to any subtype.

Total Specialization

The following figure is an example of:

generalization

The process of defining a more general entity type from a set of more specialized entity types is called:

specialization

The process of defining one or more subtypes of a supertype and forming relationships is called:

Attribute inheritance

The property by which subtype entities possess the values of all attributes of a supertype is called

Supertype

Which of the following is a generic entity type that has a relationship with one or more subtypes A. Megatype B. Supertype C. Subgroup D. Class