Which of the Following Is Not True About Representing Subtypes

question 35

Multiple Choice

Which of the following is not true about representing subtypes in a relational database design?

• A)One table is created for the supertype and one for each subtype.
• B)All of the attributes of the supertype are added to the subtype relations.
• C)The key of the supertype is made the key of the subtypes.
• D)An instance of the supertype may be related to one instance each of several subtypes.

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Definitions:

Buy Back

A corporate action in which a company purchases its own shares from the marketplace, reducing the number of outstanding shares.

Treasury Stock

Shares of a company's own stock that it has reacquired and holds in its treasury rather than retiring them.

Sale Price

The final amount at which a product or service is sold to consumers, after any discounts or adjustments.

Income Increase

A rise in the amount of money generated by an individual or organization, typically measured over a specific period of time.