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Which of the Following Is Not True About Subtype Entities

Question 52

Multiple Choice

Which of the following is not true about subtype entities?


A) Subtypes may be exclusive.
B) The supertype and subtypes will have the same identifier.
C) Subtypes are used to avoid a situation in which some attributes are required to be null.
D) Subtypes have attributes that are required by the supertype.
E) Subtypes can produce a closer-fitting data model.

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