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Home ‣ Database ‣ ER Model and Business Rules Comments
- Question
Action assertions have traditionally been implemented within an application program.
Options- A. True
- B. False
- Correct Answer
- True
- 1. It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.
Options- A. True
- B. False Discuss
- 2. Packaged data models are meant to be exactly right straight out of the box.
Options- A. True
- B. False Discuss
- 3. A supertype can only have only one subtype.
Options- A. True
- B. False Discuss
- 4. A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
Options- A. True
- B. False Discuss
- 5. 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.
Options- A. True
- B. False Discuss
- 6. An ERD that has had the entities clustered will display more entities.
Options- A. True
- B. False Discuss
- 7. An action assertion is a statement that expresses some aspect of the static structure of the organization.
Options- A. True
- B. False Discuss
- 8. An entity instance of a subtype represents the same entity instance of a supertype.
Options- A. True
- B. False Discuss
- 9. Generalization is the process of defining more general entity types from a set of more specialized entity types.
Options- A. True
- B. False Discuss
- 10. An entity cluster is a set of one or more entity types and associated relationships.
Options- A. True
- B. False Discuss
ER Model and Business Rules problems
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