digital technology

Question 1

what is a pixel?

Answer 1

made of 3 lights red, green, blue and have values of 0-255.

Question 2

what is resolution?

Answer 2

how many pixels is on a screen, PPI.

Question 3

how many different colours can be made with one pixel?

Answer 3

16,777,216.

Question 4

how big is a TB?

Answer 4

1024 GB.

Question 5

how big is a MB?

Answer 5

1024 kb.

Question 6

how big is a nibble?

Answer 6

4 bits.

Question 7

what is cloud storage?

Answer 7

files that are stored on a external sere and can be accessed with a internet connection.

Question 8

what is a server?

Answer 8

a computer which manages access to a service on a networks.

Question 9

what is connectivity?

Answer 9

how a device connects to a network.

Question 10

what is the data protection act?

Answer 10

laws that control how your personal data is used.

Question 11

what is hardware?

Answer 11

computer hardware includes the physical parts of a computer.

Question 12

what is ram?

Answer 12

stores data currently being used by the computer.

Question 13

what is rom?

Answer 13

stores data to boot up the computer.

Question 14

what is secondary storage?

Answer 14

a type of non-volatile storage that allows data to be stored for long term.

Question 15

what is tertiary storage?

Answer 15

a way of creating a duplicate copy of data at a secondary level.

Question 16

what is volatile data?

Answer 16

when the computer is switched off, it loses all the data stored.

Question 17

what is non-volatile data?

Answer 17

when the computer is switched off, it retains its data.

Question 18

bit map images

Answer 18

made of pixels, takes up more space than vectors but is more detailed, not scalable, can edit each pixel and used for web pages.

Question 19

vector images

Answer 19

made of mathematically defined objects and take up less space that bit maps, scalable but you can only edit each object, limited colour and they are used for logos.

Question 20

lossy compression

Answer 20

reconstructs all the original data but this means data is lost, it is permanent, poor quality, smaller files sizes and JPG.

Question 21

lossless compression

Answer 21

data is reconstructed, it is reversible, keeps its quality, larger file sizes and PNG are common file formats.

Question 22

capacity

Answer 22

how much space is available

Question 23

cost

Answer 23

how expensive is it per MB

Question 24

durability

Answer 24

how resistant is it to damage

Question 25

reliability

Answer 25

longevity-performance time

Question 26

speed

Answer 26

how quickly the data can be read and transferred

Question 27

sampling

Answer 27

when sound is recorded, samples are taken at regular intervals, the sample is in Hz