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- Question
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
- 1. 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 Discuss
- 2. A ternary relationship is so called because in contains two entities and one association between them.
Options- A. True
- B. False Discuss
- 3. When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
Options- A. True
- B. False Discuss
- 4. 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 Discuss
- 5. In a relation, the columns are sometimes called "attributes."
Options- A. True
- B. False Discuss
- 6. An identifier typically uses more than one attribute.
Options- A. True
- B. False Discuss
- 7. Relationship classes are associations between entity classes.
Options- A. True
- B. False Discuss
- 8. Entity instances are associated by relationship classes.
Options- A. True
- B. False Discuss
- 9. Composite identifiers consist of two or more attributes.
Options- A. True
- B. False Discuss
- 10. All instances of an entity class have the same attributes.
Options- A. True
- B. False Discuss
Data Modeling with ER Model problems
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