CSC 350 Quiz 3

Given the following entities, which of the choices below would be the most complicated? Automobile: VIN, EngineSize, NumberOfDoors, NumberOfPassengers, FuelType, Transmission SUV: VIN, EngineSize, NumberOfPassengers, NoWheelDrive, FuelType, Transmission Truck: VIN, EngineSize, NoWheelDrive, FuelType, Transmission, Payload

Define one vehicle entity type to hold all entities.

The total specialization rule states that an entity instance of a supertype is allowed not to belong to any subtype.

False

One of the major challenges in data modeling is to recognize and clearly represent entities that are almost the same.

True

Specialization is the reverse of generalization.

True

The overlap rule specifies that if an entity instance of the supertype is a member of one subtype, it can simultaneously be a member of two (or more) subtypes.

True

The third step in the data modeling process with a packaged data model is:

map data to be used from package to data in current databases.

Packaged data models:

require customization.