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ER Model and Business Rules

ER Model and Business Rules
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).

True
False

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ER Model and Business Rules
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.

False
True

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ER Model and Business Rules
When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?

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

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

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

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ER Model and Business Rules
An action assertion is a statement that expresses some aspect of the static structure of the organization.

False
True

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ER Model and Business Rules
Generalization is the process of defining more general entity types from a set of more specialized entity types.

False
True

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