Using the Normalized Relation Notation, an Attribute of a Relation

question 41

Multiple Choice

Using the normalized relation notation, an attribute of a relation which is the primary key of another relation is indicated by:

• A) an underline.
• B) a circle.
• C) a dashed underline.
• D) italics.
• E) a double-lined ellipse.

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Definitions:

Nitrogen Oxides

Refers to a group of gases composed of nitrogen and oxygen, such as NO and NO2, which are significant environmental pollutants.

Combustion

A chemical reaction that occurs when a substance reacts with oxygen to release energy in the form of heat and light, often resulting in fire.

Endangered Species

Species that faces extinction in all or a part of its range.

Threatened Species

Species likely to become endangered in the near future.