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ER Model and Business Rules

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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ER Model and Business Rules
Which of the following statements concerning business rules is true?

It should be complex.
It may include restrictions.
It should not be convertible to computer code.
All of these

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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.

True
False

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ER Model and Business Rules
There is cardinality on an EER between the supertype and subtype.

False
True

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

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ER Model and Business Rules
Which one of the following symbols is not used in an ERD?

Oval
Circle
Diamond
Rectangle

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