Data Representation - Keywords

Colour depth is...

• a) The size of the image in pixels, width * height

• a) The number of bits per pixel used to represent the colour

• a) A single dot in an image

Amplitude is…

• The height, loudness of the sound

• The number of samples taken in a second

• is a code for representing English characters as numbers

A sample is…

• The number of samples taken in a second

• A measure of amplitude at a point in time.

• The number of bits per pixel used to represent the colour

Bit depth is…

• Size of the image in pixels, width * height

• The number of bits used per sample

• A measure of amplitude at a point in time.

Sample rate is…

• The height, loudness of the sound

• A single dot in an image

• The number of samples taken in a second

A character set is..

• a defined list of characters recognised by the computer

• is a code for representing English characters as numbers

• A base 2 number system

Which of the following is a single dot in an image?

• Sample

• ASCII

• Pixel

Which of the following is a code for representing English characters as numbers?

• ASCII

• Pixel

• Sample rate

Quality of an image depends on:

• Resolution
• Metadata
• Screen size
• Computer's speed

Resolution is measured in:

• Pixels per mm or per inch
• Print size.
• Milimeters.
• Bytes.