A Constraint That Restricts a Data Field to a Given

question 27

Multiple Choice

A constraint that restricts a data field to a given number of options is called what?

• A) Unique
• B) Mandatory
• C) Set-membership
• D) Range

---

Definitions:

Fovea

A tiny pit located in the macula of the retina that provides the clearest vision of all.

Peripheral Vision

The area of vision that occurs outside the very center of gaze, enabling detection of objects and movement not directly in the line of sight.

Color-Blind

The inability or decreased ability to see color or distinguish color differences under normal lighting conditions.

Axons

Long, slender projections of nerve cells (neurons) that transmit electrical impulses away from the neuron body to other cells.