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Information Technology > Chapter 3 : Hardware > Flashcards

Chapter 3 : Hardware Flashcards

1
Q

Types of devices

A

Input
Input/output
Output
Storage
Processing

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2
Q

Input device

A

Hardware device that allows the user to interact directly with a computer

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3
Q

Input device examples

A

Keyboards
Pointing devices (mouse)
Scanners

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4
Q

Input/output device

A

Hardware device that allows a human operator or other systems to communicate with a computer by sending data to a computer (output) and receiving data from a computer (input)

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5
Q

Examples of input/output devices

A

Touch screens
Digital cameras
Smartboards

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6
Q

Output devices

A

Hardware devices that takes data stored on a computer and makes it available to the user in a way that is easy to understand

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7
Q

Forms of output

A

Pictures
Sounds

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8
Q

Storage devices

A

Devices with the general purpose to store data

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9
Q

How do storage devices differ?

A

capacity
portability
speed
- used for different reasons

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10
Q

types of storage devices

A

hard disk drive (HDD)
external (portable) hard drives
solid-state drive (SSD)
hybrid storage device
flash drives (disks)
SD/memory cards
cd/dvd/blu-ray drives

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11
Q

Processing devices

A

Devices responsible for carrying out instructions and performing calculations

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12
Q

Types of processing devices

A

central processing unit (CPU)
graphics processing unit (GPU)

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13
Q

Mobile technologies

A

Small, powerful computing devices that are easy to carry around, like smartphones, laptops and tablets

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14
Q

How are mobile technologies similar to DT computers?

A

most of same hardware

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15
Q

SP/mobile technology advantages over DT computer

A
  • built-in communication devices (BT and WiFi), better at connecting to internet
  • location-based computing
  • size and weight, portable, convenient, mobile, comfortable use anywhere
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16
Q

DT computer advantages over SP/mobile technologies

A
  • more RAM and faster processors
  • bigger screen, not limited info (spreadsheets, word processing)
  • more comfortable and precise keyboard and mouse over touchscreen (large text input)
17
Q

Generally, what is DT used for and what smartphone used for?

A

DT: powerful, serious computing tasks (large processing power required), large user input
SP: tasks requiring mobility, where convenient

18
Q

However, how have uses of SP changed over years?

A
  • more powerful
  • outperforming DT computers
19
Q

mobile constraints

A

disadvantages of smart phones, laptops and tablets caused through battery life and computing power versus power consumption

20
Q

how mobile constraints differ from previous disadvantages

A

disadvantage independent of relation to DT computer
think of as scope of ability of mobile technologies

21
Q

name mobile constraints

A

battery life
computing power

22
Q

why does battery life constrain mobile technologies - how affect and why issue

A
  1. processing power of CPU linked to amount of electricity available to it : more power used, more instructions completed
  2. issue because limited amount of power stored in battery, and needs to last whole day
23
Q

how is computing power affected by mobility of technologies?

A
  • small size of devices > all components - miniaturised
24
Q

how have mobile technologies adapted to compute as DT computers do?

A
  • chips contain many components, incl. CPU, GPU, LTE modem, WiFi connector, RAM, BT connector, GPS tracker
  • DT separate, hence each more powerful
25
Q

how do mobile constraints relate to one another?

A

power consumption
- high processing tasks use great power
- smaller components overworked, overheats
- battery flat quickly

26
Q

what is computer performance mainly dependent?

A

processing performance - think mainly CPU, but also GPU ig

27
Q

factors having a direct effect on CPU (therefore computers) performance

A
  • CPU speed
  • CPU ability to run multiple processes (do multiprocessing)
28
Q

speed of CPU

A

how many instructions it can complete per second - more = faster

29
Q

what is speed of CPU linked to

A

CPU’s clock speed: how frequently CPU completes an instruction per second

30
Q

i dont undertand clock speed vs CPU spped SEND HELP

A

thank youm futurre lucy ilysm -p maybe smth like frequency wave idk :P

31
Q

clock speed measured in

A

MHz or GHz

32
Q

what does multiprocessing allow

A

complete tasks from multiple apps simultaneously

33
Q

bad multiprocessing computer consequence

A

stutters if tries to run too many processes simultaneously

34
Q

how does other type of processing affect computer performance and what is it?

A

GPU!!
- normal apps: not affect
- graphic-intensive tasks, great affect on performance if slow

35
Q

factors affecting GPU performance

A

GPU clock speed (MHz) - higher, more instructions able to process
GPU type

36
Q

other factors affecting performance of computer

A

memory capacity
storage
speed
disk caching
network interface card (NIC)

37
Q
A

Information Technology (7 decks)

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