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Information Technology > IT is Gr8! 1.1. Hardware > Flashcards

IT is Gr8! 1.1. Hardware Flashcards

1
Q

factors influencing performance of a computer

A

CPU
Memory capacity
Cache
Storage speed
Network speed
Graphics processing ability
Bus performance

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2
Q

examples of mobile technologies

A

laptop and netbook
smartphone
tablet
e-reader

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3
Q

how can you connect a laptop to the network if there is no WiFi

A

attach 3G modem - work anywhere

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4
Q

what happened to netbooks?

A

never performed satisfactorily
pretty much vanished

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5
Q

advantages of laptops

A

powerful CPU
full-scale OS
expandable - use any range of existing computer peripherals

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6
Q

disadvantages of using a laptop

A

size - too large to be carried around all the time like mobile
battery life - too short to be useful as mobile
not always ‘on’ - sleep
no built-in cellular data - not always connected

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7
Q

advantages of using a smartphone

A

always ‘on’
always connected - built-in cellular data
convergence device
small size
built-in sensors
longer battery life

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8
Q

disadvantages of using a smartphone

A

mobile OS - not same full-scale productivity
input can be difficult
not easily expandable with peripherals

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9
Q

advantages of using a tablet

A

larger screens + bigger keyboards
longer battery life than laptops

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10
Q

disadvantages of using a tablet

A

mobile OS - same physical disadvantages as smartphone: not full-functioning, less capable, limited by capabilities of OS
full desktop OS - same physical disadvantages of laptop - battery, not always on

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11
Q

Two categories of e-readers

A

Single-purpose design
Tablet-based design

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12
Q

Single-purpose design

A

Kindle
Display text
Low powered
No other software

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13
Q

Tablet-based design

A

Kindle Fire
Full, colour, multimedia
Other software - not much developed

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14
Q

Advantages of dedicated (single-purpose) e-reader devices

A

Cheaper than other mobile tech
Smaller and lighter than tablet
Longer battery life
Easy to read in sunlight

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15
Q

Disadvantages of dedicated (single-purpose) e-readers

A

Single-purpose device
Extra item to carry

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16
Q

Is a laptop a mobile device

A

No, but it is portable

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17
Q

Advantages of mobility

A

Convenience
- combine functions (carry fewer)
- not time/location restricted
- achieves/produces more in less time

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18
Q

Future of computer trending towards

A

Always on
Always connected
Powerful
Convergent
Mobile (or even wearable)

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19
Q

What is always on?

A

Mobile technology - display off to save power
Fast + responsive

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20
Q

Ways to stay always connected

A

WiFi/cellular data (3G,4G,LTE) to INTERNET - access more than what on device storage

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21
Q

How does mobile tech compare to computers in terms of power?

A

Have mulit-core, 64 bit CPUs
Not as good

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22
Q

convergence

A

trend whereby separate technologies and functions from multiple devices are combined into a single multi-purpose device

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23
Q

Effect of convergence

A

Miniaturisation - mobile tech

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24
Q

Mobile means

A

Something that does not need to remain in one place or attached to wired connections such as power or communication cables

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25
Q

Examples of wearable technologies

A

Google Glass
Apple Watch
Smartwatches
Dont need to remember to bring - always on you

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26
Q

Constraints of mobile tech

A

Battery life
Speed and availability of communication
Size

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27
Q

What is the biggest limiting factor in mobile tech?

A

Battery life

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28
Q

Why is battery life shorter?

A

more powerful device - greater need for electricity - bigger battery/device
More powerful CPU - uses more electricity

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29
Q

Name one thing that uses a lot of power

A

Connection to network - uses radio-based communication tech
Also sensors, GPS, etc.

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30
Q

What does limited battery life mean for a device?

A

Access to chargers / spare batteries
Run out of power during day
Choose how to use device to limit use to conserve power
Trade-off of computing power and power consumption

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31
Q

How does speed and availability of communication limit mobile tech?

A

poor cellphone reception

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32
Q

How does size limit the capabilities of mobile tech?

A
  • small/light/easy to carry
  • powerful
  • lasting batteries
    Batteries and computing components take up physical space
33
Q

How to understand performance of computer

A

How each part affects and relates

34
Q

General rule

A

Faster - latest tech - more expensive

35
Q

Factors that affect the performance of a computer

A

CPU
Memory
Cache
Storage
Network
Graphics processing ability
Bus performance

36
Q

Aspects of CPU that affects computer performance

A

Speed
Cores

37
Q

What is speed measured in

A

GHz

38
Q

How does speed of CPU affect performance?

A

Higher speed - process more instructions in given amount of time

39
Q

How many CPUs in 4 core units?

A

4

40
Q

What does multi-core processing allow for?

A

Separate programs simultaneously
Better performance
Multiple clients simultaneously

41
Q

Cheapest and simplest way to improve computer performance

A

Memory

42
Q

Speed of memory

A

Faster than storage
Keeping in memory faster than retrieving to/from storage

43
Q

core

A

a single complete working CPU circuit - relevant because modern chips are ‘multi-core’ and contain more than one ‘core’ in a single physical CPU ‘chip’

44
Q

e-book

A

electronic version of a book, read by using an e-reader or other e-book software

45
Q

e-reader

A

single-purpose device designed to allow you to read e-books (and have a portable library of e-books)

46
Q

laptop

A

a complete computer in a case that includes a screen, keyboard, pointing device, WiFi and a battery to power the device when away from a fixed power source

47
Q

netbook

A

a low-power, low-spec version of a laptop (i.e. with small screen, and less RAM, storage and processing power) designed for very basic computer tasks such as web browsing and e-mail (hence the name netbook). Largely discontinued, replaced by tablets

48
Q

power users

A

users who need highend computer specifications for their job or special interest. They may also need specific hardware related to the task, and will typically use most of the advanced functions of the software they use

49
Q

smartphone

A

basically a mobile phone/computer with an OS, but only as large as an ‘ordinary’ cellphone. It can run apps (programs) and has sensors built into the hardware (e.g. GPS, accelerometers, camera) to extend its usefulness as a multi-purpose device

50
Q

smartwatch

A

a watch that offers additional computing power / sensors as well and can interface with your smartphone / tablet / computer

51
Q

SOHO

A

an acronym for Small Office Home Office, used to describe smaller business organisations and to differentiate them from large corporations

52
Q

tablet

A

a larger (7” and up) version of a smartphone; runs the same OS and has all the same technologies (except the ability to be used as a phone); with the added advantage of a larger screen area for greater productivity

53
Q

Memory

A

where computer stores data or instructions it is working on

54
Q

What is a cache?

A

Use of a limited amount of faster media to speed up access to data and instructions stored on a slower media

55
Q

When is cache used?

A

Temporarily stores recent/frequent accessed data

56
Q

Where is cache typically stored?

A

CPU or hard drive

57
Q

How does storage affect performance?

A

Lower access time better - average time it takes to read or write data

58
Q

Very effective way to improve computer performance

A

Replace HDD with SSD

59
Q

SSDs characteristics

A

Very expensive
Smaller

60
Q

What to do if you can’t afford an SSD for your whole computer?

A

Hybrid - SSD for OS and data on HDD

61
Q

How is network speed measured

A

Megabits/Gigabits per second (G/Mps)

62
Q

Higher network speed means

A

More data transferred in same amount of time

63
Q

How to improve graphics processing ability

A

Better graphics card
- speed and no. of processing cores on GPU
- speed and amount of memory
- speed of coms with motherboard

64
Q

What is graphics processing ability specifically useful for?

A

Graphics-intensive tasks - image editing, 3D, gaming

65
Q

What does bus performance refer to?

A

Speed at which data is moved between the CPU and other parts of the computer system (esp. memory, GPU, storage)

66
Q

Speed of bus performance measured in

A

Mhz/Ghz
Number of lanes

67
Q

Least significant factor in computer performance

A

Bus performance

68
Q

How to increase bus performance

A

New motherboard
Need faster other stuff to make use of

69
Q

Recommendations for hardware based on

A

Use

70
Q

Different computer uses

A

Home/personal
SOHO
Entertainment
Power users

71
Q

SOHO uses

A

Accounting/billing
DB
Admin
Workstation

72
Q

Power users

A

Gamers
Architects
Engineers
Video editing professionals
Scientists
HIGH END COMPUTER SPECIFICATIONS - hardware and advanced functions of software

73
Q

Most NB system unit specifications

A

CPU
Memory
Storage

74
Q

What is most commonly what needed to be upgraded

A

Memory - for all

75
Q

Storage specs based on usage

A

Home/personal : never fill
Entertainment : large
Power : series of hard drives

76
Q

Series of hard drives acting as one unit

A

RAID : redundant array of inexpensive disks

77
Q

SSDs provide

A
  • faster boot up
  • better system performance
78
Q

DVD drive

A

Optical drive that can play, read and write CD and DVD discs

79
Q
A

Information Technology (7 decks)

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