ER Model and Business Rules
When an entity instance must be a member of only one subtype, it is which of the following?

Disjoint with partial specialization
Disjoint with total specialization
Overlap with partial specialization
Overlap with total specialization

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ER Model and Business Rules
Inheritance is which of the following?

When a subtype entity inherits values of the supertype attribute
When a subtype entity inherits values of another subtype attribute
When a supertype entity inherits values of another supertype attribute
When a supertype entity inherits values of the subtype attribute

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ER Model and Business Rules
Specialization is which of the following processes?

Defining one or more subtypes of the supertype and not forming supertype/subtype relationships.
Defining one or more subtypes of the supertype and forming supertype/subtype relationships.
Defining one or more supertypes of the subtype and forming supertype/subtype relationships.
Defining one or more supertypes of the subtype and not forming supertype/subtype relationships.

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ER Model and Business Rules
A subtype discriminator is which of the following?

An attribute of the subtype whose values determine the subtype
An attribute of the supertype whose values determine the supertype
An attribute of the subtype whose values determine the supertype
An attribute of the supertype whose values determine the subtype

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