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ER Model and Business Rules
When an entity instance must be a member of only one subtype, it is which of the following?
Disjoint with total specialization
Disjoint with partial specialization
Overlap with total specialization
Overlap with partial specialization
Correct Answer:
Disjoint with total specialization
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More Questions from
ER Model and Business Rules
A rectangle represents which of the following in an EER?
Specialization is which of the following processes?
Which of the following statements concerning business rules is true?
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.
There is cardinality on an EER between the supertype and subtype.
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.
Total specialization is represented by double lines between the supertype and subtype on an EER.
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.
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
A supertype can only have only one subtype.
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