ER Model and Business Rules MCQ Questions and Answers

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In this section we provide lots of objective question of ER Model and Business Rules in Database Management System.

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11) A subtype discriminator is which of the following?

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?

13) A subtype entity name should be which of the following?

14) Use of a supertype/subtype relationship is necessary when which of the following exists?

15) Which of the following is not one of the three ways to classify an action assertion?