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ER Model and Business Rules

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

Oval
Rectangle
Diamond
Circle

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ER Model and Business Rules
Packaged data models are meant to be exactly right straight out of the box.

True
False

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ER Model and Business Rules
Total specialization is represented by double lines between the supertype and subtype on an EER.

True
False

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ER Model and Business Rules
It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.

False
True

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

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

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ER Model and Business Rules
A subtype entity name should be which of the following?

Concise
Specific to the organization
A singular noun
All of these

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