What Is the Role of a Foreign Key

question 54

Multiple Choice

What is the role of a foreign key?

• A) It is a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.
• B) It is a unique way to identify each record.
• C) It is a field that uniquely identifies a given record in a table.
• D) All of these.

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Definitions:

Output

The total amount of goods or services produced by a person, machine, factory, country, etc., within a particular time period.

Marginal Product

The additional output generated by employing one more unit of a factor of production.

Output Level

The total quantity of goods and services that a firm or industry produces over a set period.

Marginal Cost

The additional cost incurred by producing one more unit of a product or service.