What Is a Foreign Key

question 9

Multiple Choice

What is a foreign key?

• A) A field (or group of fields) that uniquely identifies a given entity in a table.
• B) 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.
• C) Characteristics or properties of an entity.
• D) A field (or group of fields) that uniquely identifies a given attribute in a table.

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Definitions:

Arithmetic and Logic Processing

The fundamental operations carried out by a computer processor to perform mathematical and logical operations.

CPU

A central processing unit, which serves as the primary component of a computer responsible for interpreting and executing instructions.

NTC Thermister

A type of thermistor (temperature-sensitive resistor) where resistance decreases as temperature increases, used for temperature measurement and control.

Non-linear Readings

Measurements that do not have a direct proportionality or linear relationship with the variables being measured.