The Requirement That No Record May Have a Null Primary

question 31

Multiple Choice

The requirement that no record may have a null primary key and that entries for primary keys be unique is called the

• A) Rule of Referential Integrity.
• B) Rule of Primary Keys.
• C) Rule of Entity Integrity.
• D) Rule of Null Values.

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Definitions:

Financial Instruments

Assets that can be traded, including stocks, bonds, derivatives, and currencies.

U.S. Government

The federal government of the United States, a constitutional republic comprising the Executive, Legislative, and Judicial branches.

Market-Value Weighted

An indexing method where the weight of each constituent security in an index or portfolio is based on its total market capitalization, favoring larger companies.