For a Unary M:N Relationship

question 16

Multiple Choice

For a unary M:N relationship:

• A)the entity type is modeled as one relation;using as its primary key a composite key,a separate relation is created to represent the M:N relationship
• B)the entity type and the M:N relationship are modeled as one relation;a composite key is used
• C)separate relations for the class and for each subclass are created;primary and foreign keys are established for each class
• D)the primary key of the entity on the one side of the relationship serves as a foreign key in the relation on the many side of the relationship

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Definitions:

Relatedness

The need to feel connected to others, being a fundamental aspect of human motivation.

Lower-order Need

In Maslow's hierarchy of needs, refers to the basic physiological and safety needs that are fundamental for individual survival and security.

Social Interaction

The process by which people act and react in relation to others in a social context.

McGregor

Refers to Douglas McGregor, a social psychologist best known for proposing two theories of human motivation and management: Theory X and Theory Y.