Which of the Following Is NOT a Good Candidate for a Primary

question 44

Multiple Choice

Which of the following is NOT a good candidate for a primary key field for a Customer table?

• A) Last Name
• B) Customer Number
• C) Employee Identification Number
• D) Customer ID

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Definitions:

Expected Number

A statistical measure describing the average or mean value anticipated in a random variable or in the outcomes of a random experiment.

Binomially Distributed

A distribution characteristic of a random variable that represents the number of successes in a fixed number of independent Bernoulli trials, each with the same probability of success.

Standard Deviation

A formula to assess how widespread or dispersed a series of values is.

Expected Number

A statistical term referring to the mean value predicted for a particular variable or event in a probability distribution.