Unit 1

Question 1

What is a MAC address?

Answer 1

Unique identifier for a device on a network.

Question 2

Uses of Hexadecimal system

Answer 2

• Error Codes
• MAC Addresses
• IPv6 Addresses
• HTML Colour codes

Question 3

What is ASCII

Answer 3

• Uses 7 and 8 bit codes for characters

Question 4

Disadvantages of ASCII

Answer 4

• Cannot represent non western languages
• Very limited characters

Question 5

Benefits of Unicode

Answer 5

• Can represent a huge number of characters and languages
• more efficient coding system than ASCII
• User can assign their own characters and symbols

Question 6

Overflow Error

Answer 6

A calculation that produces a value too large for the computers register

Question 7

Sampling resolution

Answer 7

Number of bits used to represent sound amplitude in a digital recording

Question 8

Bit depth

Answer 8

Number of buts used to represent the smallest unit in a sound file

Question 9

Colour Depth

Answer 9

Number of Bits used to represent the colours of pixel

Question 10

Sampling Rate

Answer 10

Number of sound samples taken per second in digital sound recording

Question 11

Bitmap Image

Answer 11

An image made up of pixels

Question 12

Image resolution

Answer 12

Number of pixels in X Y directions of an image

Question 13

Lossy

Answer 13

Compression method where file data cannot be recovered during the decompression process

Question 14

Lossless

Answer 14

A file compression method that allows for full reconstruction during decompression process