Exercise: The Enhanced E R Model And Business Rules

Questions for: The Enhanced E R Model And Business Rules

Which of the following is not one of the three ways to classify an action assertion?
A:
Condition
B:
Integrity Control
C:
Authorization
D:
Enabler
Answer: D
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Use of a supertype/subtype relationship is necessary when which of the following exists?
A:
An instance of a subtype participates in a relationship that is unique to that subtype.
B:
An instance of a subtype participates in a relationship that is the same as the other subtypes.
C:
Attributes apply to all of the instances of an entity type.
D:
No attributes apply to any of the instances of an entity type.
Answer: A
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A subtype entity name should be which of the following?
A:
A singular noun
B:
Specific to the organization
C:
Concise
D:
All of the above
Answer: D
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When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?
A:
Disjoint with total specialization
B:
Disjoint with partial specialization
C:
Overlap with total specialization
D:
Overlap with partial specialization
Answer: C
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A subtype discriminator is which of the following?
A:
An attribute of the supertype whose values determine the subtype
B:
An attribute of the subtype whose values determine the supertype
C:
An attribute of the supertype whose values determine the supertype
D:
An attribute of the subtype whose values determine the subtype
Answer: A
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