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Introduction to Database System

Introduction to Database System
A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance.

False
True

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Introduction to Database System
A functional dependency is a relationship between or among attributes.

True
False

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Introduction to Database System
Which of the following is a serious problem of file management systems?

difficult to update
data redundancy
lack of data independence
All of these
program dependence

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Introduction to Database System
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:

A → (B,C).
(B,C) →
A →
A →

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Introduction to Database System
An attribute describes the entity's characteristics.

False
True

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Introduction to Database System
A ternary relationship is so called because in contains two entities and one association between them.

False
True

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