Database - ER Model and Business Rules - Discussion

Discussion :: ER Model and Business Rules - General Questions (Q.No.4)


When an entity instance must be a member of only one 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: Option A


No answer description available for this question.

Belete said: (Jan 10, 2017)  
There is no indicator whether the participation is total or partial so the answer will be A & B.

Ankit said: (Feb 25, 2017)  
Yes, you are Right @Belete.

The word entity instance should be replaced with weak entity instance.

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