Which of the Following Is a Specialization Hierarchy Disjoint Constraint

question 18

Multiple Choice

Which of the following is a specialization hierarchy disjoint constraint scenario in case of partial completeness?

• A) Subtype discriminator can be null.
• B) Subtype discriminator cannot be null.
• C) Each supertype occurrence is a member of only one subtype.
• D) Each supertype occurrence is a member of at least one subtype.

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Definitions:

Nineteenth-Century Idea

A concept, doctrine, or movement that gained prominence or was innovated in the 19th century, influencing various aspects of society, politics, economics, or culture during that period.

Gender Roles

Social and behavioral norms that are considered appropriate for individuals of a given sex within a specific culture or society, often influencing aspects of daily life and personal identity.

Forty-Acre Plots

Part of post-Civil War Reconstruction plans, famously associated with General Sherman's Special Field Orders, No. 15, intended to redistribute Southern land to freed slaves as compensation.

Wage Labor System

An employment system where workers sell their labor in exchange for wages, typically prevalent in capitalist economies.