What Is a Primary Key

question 208

Multiple Choice

What is a primary 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 among 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:

Random Variable X

A variable whose possible values are numerical outcomes of a random phenomenon, with each outcome having an associated probability.

Probability Model

A mathematical representation of a random phenomenon, defined by a sample space, events within the sample space, and probabilities associated with each event.

Fair Dice

A perfectly balanced dice where each outcome has an equal chance of occurring, ensuring unbiased results in games of chance.

Sum Greater

A condition or outcome where the total quantity or amount exceeds a specified reference point or comparison amount.