The Logical View of a Database

question 68

Multiple Choice

The logical view of a database:

• A)shows how data are organized and structured on the storage media.
• B)presents an entry screen to the user.
• C)allows the creation of supplementary reports.
• D)presents data as they would be perceived by end users.

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Definitions:

Foveas

The small depression in the retina of the eye where visual acuity is highest, containing a high concentration of cones, responsible for sharp central vision.

Rods

Photoreceptor cells in the retina responsible for vision in low light conditions.

Young-Helmholtz Theory

A theory suggesting that the human eye perceives color through the response rates of three kinds of cones, each sensitive to red, green, or blue wavelengths.

Color Vision

The ability of the visual system to distinguish objects based on the wavelengths of the light they reflect, emit, or transmit.