Data - 3.1 Data representation

Question 1

Character set:

Answer 1

the defined list of characters recognized by a computer’s hardware and software.

Question 2

Encryption:

Answer 2

the process of encoding a message into a form that only the intended recipient can decipher it.

Question 3

Pixel:

Answer 3

short for ‘picture element’, the smallest single point of colour in a graphic image.

Question 4

Resolution:

Answer 4

The number of pixels per inch when the image is displayed. The higher the resolution the better the image’s quality.

Question 5

colour depth:

Answer 5

The number of bits used to encode the colour of each pixel.

Question 6

Sampling:

Answer 6

taking measurements of the sound wave at regular but distinct intervals of time.

Question 7

Fidelity:

Answer 7

the correspondence between the original sound and the recording. The greater the fidelity the greater the similarity between them.

Question 8

Bit depth:

Answer 8

the number of bits used to encode the information from each sample.