data-modeling-with-er-model database question and answers -Page 3

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Data Modeling with ER Model problems

1. An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.
Options
A. True
B. False

Correct Answer: False

2. When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
Options
A. True
B. False

Correct Answer: False

3. A ternary relationship is so called because in contains two entities and one association between them.
Options
A. True
B. False

Correct Answer: False

4. In a 1:N relationship, the parent is the entity on the one side of the relationship and the child is the entity on the N side of the relationship.
Options
A. True
B. False

Correct Answer: True

5. An entity is something that can be identified in the user's work environment; something that the users want to track.
Options
A. True
B. False

Correct Answer: True

6. An identifier typically uses more than one attribute.
Options
A. True
B. False

Correct Answer: False

7. Relationship classes are associations between entity classes.
Options
A. True
B. False

Correct Answer: True

8. Entity instances are associated by relationship classes.
Options
A. True
B. False

Correct Answer: False

9. Composite identifiers consist of two or more attributes.
Options
A. True
B. False

Correct Answer: True

10. All instances of an entity class have the same attributes.
Options
A. True
B. False

Correct Answer: True

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