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CAT Theory > Hardware Devices > Flashcards

Hardware Devices Flashcards

1
Q

What is the information processing cycle

A

Input, processing, output or storage, communication

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2
Q

Give examples of input devices

A

Keyboard, mouse, touch screen, scanner, webcam

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3
Q

Give examples of output devices

A

Monitor, speakers, printers

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4
Q

Give examples of storage devices

A

Hard drive, Flash drive, SSD, Optical media

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5
Q

Give examples of communication devices

A

Cellular modem, ADSL router

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6
Q

What does input involve

A
  • Identifying data needed
  • Deciding how to capture data
  • Creating data capture forms
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7
Q

What does output involve

A
  • Sending directly to storage
  • Communicating to other computers
  • Control equipment or devices
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8
Q

What does an accelerometer do

A

Changes screen between landscape and portrait

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9
Q

What takes place when a product is sold

A

1) Barcode scanner reads barcode
2) Barcode number sent to branch computer by EPIS terminal
3) Branch computer uses barcode to scan stock and price
4) Updates stock level
5) Price and description displayed
6) Price added to total

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10
Q

Advantages of EPOS system

A
  • Shelves always stocked
  • Customers dealt with much quicker
  • Fully itemised receipt
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11
Q

How does processing work

A

It only takes place if software and data is loaded into RAM. It uses algorithms to capture data and create information that can be displayed

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12
Q

How does processing work

A

It only takes place if software and data is loaded into RAM. It uses algorithms to capture data and create information that can be displayed

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13
Q

What does storage include

A
  • Choosing the correct storage media
  • Using security
  • Implementing backup policies
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14
Q

Advantages of a keyboard

A
  • Fastest way to enter test
  • Easy to learn and use
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15
Q

Limitations of a keyboard

A
  • Weren’t designed to be used with GUI interface
  • Takes up space
  • Disabled people might struggle
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16
Q

What are the 2 types of keyboards

A

QWERTY and DVORAK

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17
Q

Wireless vs wired

A

Wireless prevents cable clutter, but could run out of battery

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18
Q

What are problems with keyboards and how can you solve them

A
  • Sticky keys (wipe with damp cloth)
  • Not responding (replace battery or check cables)
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19
Q

What is the GUI

A

Type of user interface that allows users to interact through graphical icons and visual indicators

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20
Q

Why would someone use a touch screen

A
  • Replacement for a mouse
  • Addition to mouse and keyboard
  • Best interface systems
21
Q

What is a touch screen

A

A display device which allows the user to interact with a computer by touching areas of the screen

22
Q

Advantages of a touchscreen

A
  • Functions as mouse and keyboard
  • Natural input
  • Easy to use
  • Increases space on desk
23
Q

Disadvantages of a touch screen

A
  • On screen keyboard harder to use
  • Quality depends on OS
24
Q

What is a touch pad

A

Integrated solution of a mouse in a laptop

25
Q

Uses of scanners

A
  • capture images from paper
  • convert with OCR to editable text
  • read barcodes
26
Q

What are the 3 types of scanners

A
  1. Flatbed (works like copy machine and creates file of document)
  2. Hand Held (manually pressed over image)
  3. Sheet Fed (motorised rollers)
27
Q

Advantages of scanners

A
  • convert document to digital format
  • convert image to text
28
Q

Disadvantages of scanners

A
  • quality depends on original image
  • can be affected by dirt
  • can take a lot of time
29
Q

What is a QR code

A

A barcode like logo which can be scanned by smartphones. They contain a variety of information which they direct the user to once scanned.

30
Q

Factors (buying decisions of digital cameras)

A
  • Resolution (number of horizontal and vertical pixels)
  • Colour depth (higher the better)
  • Sensor size (bigger better)
  • ISO rating (sensitivity to light)
31
Q

What is a webcam

A

A video camera that feeds or streams its image in real time through a computer to a computer network

32
Q

What are 2 ways to connect to a microphone

A

USB port or Aux

33
Q

Advantages of microphone

A
  • Record verbal communication
  • Give voice commands
  • Add input of sound
34
Q

Disadvantages of microphones

A
  • Don’t provide high quality sound if built in
  • Need the ICT decide to record sounds
  • Difficult to use in noisy environments
35
Q

What are types of output devices

A

Monitor, speaker, printer, projector, plotter

36
Q

Image quality of screens

A

Colour depth: higher the better
Pixel density: higher the better
Refresh rate: higher the better
Contrast ratio: (relationship between darkest black and brightest white)

37
Q

Advantages of speakers / headphones

A
  • listen to sounds individually or with a group
  • listen to voice messages
  • listen on the go
38
Q

Disadvantages of speakers/ headphones

A
  • sound quality depends on quality of peripheral
39
Q

What is a laser printer

A

Print black and white or colour documents. It has high quality and low costs but is expesnvise to buy

40
Q

What is a inkjet printer

A

Print black and white or colour documents, it’s cheaper to buy and the best quality photographic printers. They have higher running costs and slower speeds

41
Q

What is a dot- matrix printer

A

Prints receipts, invoices etc. It is cheap and have low running costs, but the quality is very low

42
Q

What are multifunction printers

A

An office machines which incorporates the functionality of multiple devices in one. It can scan, photocopy, print and fax

43
Q

What are the codes for printer colours

A

CMY- colour
K- black

44
Q

Advantages of 3D printing

A
  • Able to print prototypes
  • “once off” custom parts
45
Q

Advantages of 3D printing

A
  • Able to print prototypes
  • “once off” custom parts
46
Q

Examples of storage devices

A
  • Hard drive (HDD)
  • External hard drive
  • Flash drive
  • Optical media (CD /DVD)
  • Solid state drive (SSD)
47
Q

Uses of Hard disk drive (HDD)

A
  • Store and carry media
  • Store backups safely
  • Add extra storage to computer
48
Q

Uses of flash drive

A
  • Carry data around
  • Make back ups
  • Distribute data

CAT Theory (5 decks)

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