Subtypes Should Be Used When

question 61

Multiple Choice

Subtypes should be used when:

• A) there are attributes that apply to some but not all instances of an entity type.
• B) supertypes relate to objects outside the business.
• C) the instances of a subtype do not participate in a relationship that is unique to that subtype.
• D) a recursive relationship is needed.

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Definitions:

Cotton Sharecropping

A system of agriculture in which landowners allow tenants to use the land in return for a share of the crops produced on their portion of land, prevalent in the Southern United States post-Civil War.

Mechanical Cotton Picker

A machine that automates the cotton picking process, significantly impacting agricultural productivity and labor dynamics.

Agricultural Adjustment Agency

A New Deal agency in the United States created in 1933 to boost agricultural prices by reducing surpluses, primarily through paying farmers to reduce crop area.

George C. Marshall

An American military leader, statesman, and Nobel Peace Prize laureate who played a significant role in World War II and formulated the Marshall Plan for European recovery post-war.