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ER Model and Business Rules

ER Model and Business Rules
If an entity adheres to the disjoint rule, then an entity instance can be a member of more than one entity for a given supertype.

True
False

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ER Model and Business Rules
A supertype/subtype hierarchy is which of the following?

Each subtype has only one attribute.
Each subtype has only one supertype.
Each supertype has only one subtype.
Each supertype has only one attribute.

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ER Model and Business Rules
A rectangle represents which of the following in an EER?

Attribute
Optional One
Relationship
Entity

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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
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.

True
False

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

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

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