Keywords 1 - Data Representation

Question 1

Data

Answer 1

Numbers, symbols or alphanumeric characters in their raw format before processing

Question 2

Analogue

Answer 2

The smooth stream of data that our senses process on a daily basis, such as a sound wave

Question 3

Digital

Answer 3

Data represented in the values 1 and 0 that a computer can process

Question 4

Denary

Answer 4

A system of number with a base of 10. Each unit used increases by the power of 10.

Question 5

Binary

Answer 5

A system of number with a base of 2. Each unit used increases by the power of 2.

Question 6

Register

Answer 6

A small piece of memory where values can be held

Question 7

Hexadecimal

Answer 7

A system of number with a base of 16. Each unit used increases by the power of 16.

Question 8

Debug

Answer 8

Finding and fixing errors and problems in a program

Question 9

Bit

Answer 9

Short for Binary digIT, this is the smallest unit of data in a computer (0 or 1)

Question 10

Byte (B)

Answer 10

8 bits

Question 11

Kilobyte (KB)

Answer 11

1024 bytes

Question 12

Megabyte (MB)

Answer 12

1024 KB

Question 13

Gigabyte (GB)

Answer 13

1024 MB

Question 14

Terabyte (TB)

Answer 14

1024 GB

Question 15

Petabyte (PB)

Answer 15

1024 TB

Question 16

Character

Answer 16

Text, numbers and symbols, for example each key on a keyboard

Question 17

ASCII

Answer 17

8 bit system to represent characters in memory (max 256 characters)

Question 18

Unicode

Answer 18

16 bit system to represent characters in memory (max 65,536 characters)

Question 19

Pixel

Answer 19

A single dot on an image

Question 20

Metadata (images)

Answer 20

Tells the computer information about the image, such as its resolution

Question 21

Resolution

Answer 21

The size of an image in pixels, with width and height

Question 22

Sampling

Answer 22

Digital sound is recorded at set timed intervals by taking a sample of the sound, measured in Hertz

Question 23

Hertz

Answer 23

The sample rate; 1 hertz = 1 sample per second

Question 24

Data compression

Answer 24

The bit structure of a file is manipulated to reduce the file size

Question 25

Algorithm

Answer 25

A step-by-step set of instructions

Question 26

Lossy compression

Answer 26

Data deemed unnecessary is permanently removed during file compression (Lossy)

Question 27

Lossless compression

Answer 27

A compression method in which no data is lost (Lossless)