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Database - ER Model and Business Rules

Exercise : ER Model and Business Rules - General Questions
11.
A subtype discriminator is which of the following?
An attribute of the supertype whose values determine the subtype
An attribute of the subtype whose values determine the supertype
An attribute of the supertype whose values determine the supertype
An attribute of the subtype whose values determine the subtype
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
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?
Disjoint with total specialization
Disjoint with partial specialization
Overlap with total specialization
Overlap with partial specialization
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
A subtype entity name should be which of the following?
A singular noun
Specific to the organization
Concise
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Use of a supertype/subtype relationship is necessary when which of the following exists?
An instance of a subtype participates in a relationship that is unique to that subtype.
An instance of a subtype participates in a relationship that is the same as the other subtypes.
Attributes apply to all of the instances of an entity type.
No attributes apply to any of the instances of an entity type.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following is not one of the three ways to classify an action assertion?
Condition
Integrity Control
Authorization
Enabler
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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