Database - ER Model and Business Rules - Discussion

Discussion Forum : 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?
Disjoint with total specialization
Disjoint with partial specialization
Overlap with total specialization
Overlap with partial specialization
Answer: Option
No answer description is available. Let's discuss.
2 comments Page 1 of 1.

Ankit said:   6 years ago
Yes, you are Right @Belete.

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

Belete said:   6 years ago
There is no indicator whether the participation is total or partial so the answer will be A & B.

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