Data

Question 1

What is analogue data?

Answer 1

Data that is represented in a physical way

Question 2

What are some examples of analogue devices?

Answer 2

vinyl records, sundials, analogue watches

Question 3

What is digital data?

Answer 3

Data stored by computers as a combination of 1s and 0s

Question 4

What are some examples of digital devices?

Answer 4

microphone, monitor

Question 5

What are the advantages of analogue and digital data?

Answer 5

analogue:
continuous data is stored so no loss of data quality

digital:
less physical space is required to store the same amount of data

Question 6

What are the disadvantages of analogue and digital data?

Answer 6

analogue:
Can decline when being copied or transferred due to corruption
digital:
due to data sampling, data is not recorded in its entirety so quality is lost

Question 7

How do you convert between analogue and digital data?

Answer 7

A/D or D/A

Question 8

What is sampling frequency?

Answer 8

How many samples are identified per second, determine quality of converted sound data

Question 9

What are the factors to consider when determining the advantages and disadvantages of digital data storage?

Answer 9

• data retrieval
• efficiency
• expense
• scalability
• management
• accessibility
• security

Question 10

what are the advantages and disadvantages of data retrieval?

Answer 10

advantages:
- can search through files quickly
- can sort files in different orders
- can copy files
- can arrange folders into different structures

disadvantages:
- can easily lose files due to bad organisation
- all files could be lost if hardware fails
- if cloud storage is used, bad connection could slow down storing data

Question 11

what are the advantages and disadvantages of efficiency?

Answer 11

advantages:
- can compress data, which allows for faster uploading and downloading of files
- a warning is given before overwriting files so you don’t accidentally change them
- you can physically reorganise your files using defragmentation

disadvantages:
- if files are fragmented, they could slow access time

Question 12

what are the advantages and disadvantages of expenses?

Answer 12

advantages:
- optical storage is cheap
- magnetic storage is fairly cheap

disadvantages:
- solid state storage can be expensive

Question 13

what are the advantages and disadvantages of security?

Answer 13

advantages:
- passwords can be placed on files
- files can be encrypted
- files can be made read-only
- if using RAID1, no data is lost if one drive fails

disadvantages:
- data could be stolen or attacked by unauthorised users
- cloud storage is susceptible to unauthorised access
- weak passwords can be guessed

Question 14

what are the advantages and disadvantages of accessibility?

Answer 14

advantages:
- specialist devices can convert text data to other data, such as sound
- device settings can be changed to suit needs
- there are specialist input devices

disadvantages:
- not all programs work with specialist devices
- specialist devices can be more expensive

Question 15

what are the advantages and disadvantages of management?

Answer 15

advantages:
- you can set access level rights
- you can set different file properties such as read-only to different users

disadvantages:
- a system manager needs to be appointed, which can be costly

Question 16

what are the advantages and disadvantages of scalability?

Answer 16

advantages:
- if there is little storage available, more storage can be added via network attached storage devices, or more cloud storage can be obtained

disadvantages:
- The cost of NAS and cloud storage can become costly depending on how much storage you need