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ICT > Chapter 2 - Input and Output Devices > Flashcards

Chapter 2 - Input and Output Devices Flashcards

1
Q

What are the two different types of keyboards

A

QWERTY

Ergonomic (used by people who have carpal tunnel syndrome/RSI)

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2
Q

What are 2 uses of keyboards

A

Input of data into applications software

Typing in commands to the computer

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3
Q

List 3 advantages of keyboards

A

Fast entry
Easy to use
Easier to do verification checks as data is entered

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4
Q

List 3 disadvantages of keyboards

A

Difficult to use if user has limited arm/wrist use
Slow method compared to DDE (direct data entry)
Fairly large device that uses up desk space

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5
Q

What is a “Concept keyboard”

A

Uses icons/phrases instead of standard letters
fast data entry
waterproof keyboard

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6
Q

Where are concept keyboards used

A

Restaurants

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7
Q

What is a “Numeric keypad”

A

Enter numbers only

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8
Q

What are 5 uses of numeric keyboards

A 
ATMs (Automatic Teller Machines)
Mobile phones
POS (Point-of-Sale) terminals
Chip and PIN devices
Fast entry of numeric data in a spreadsheet
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9
Q

List 2 advantages of numeric keypads

A

Faster than standard keyboards

Portable

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10
Q

List 2 disadvantages of numeric keypads

A

Small keys - hard to input

Order of numbers on keypad isn’t intuitive

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11
Q

List 4 uses of a mouse

A

Opening/closing/minimising software
Grouping/moving/deleting files
Image editing
Controlling position of pointer

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12
Q

List 3 advantages of a mouse

A

Faster way
Quick way to navigate through applications and internet
Doesn’t require large desk area

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13
Q

List 3 disadvantages of a mouse

A

Can be difficult if user has restricted hand/wrist movement
Easy to damage
Difficult to use if no flat surface is available

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14
Q

List 2 advantages of touchpads

A

Same as mouse

Integrated in laptop - no need to carry extra pointing device

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15
Q

List 3 disadvantages of touchpads

A

Difficult to use for people with limited hand/wrist movement
Difficult to control
Difficult to use (drag and drop)

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16
Q

List 3 uses of trackerballs

A

Applications where user has disability (RSI)
Used in control room environment - faster
Used in luxury cars

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17
Q

List 5 advantages of trackerballs

A 
Doesn't need same fine control
Easier to use if operator is disabled
More accurate positioning
More robust
Less desk space required
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18
Q

List 2 disadvantages of trackerballs

A

not supplied with computers - more costly

May need training

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19
Q

What is a “Remote control”

A

Controls operation of other devices remotely using infrared signals

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20
Q

List 3 uses of remote controls

A

Tv, satellite, DVD
Multimedia
Industrial

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21
Q

List 2 advantages of remote controls

A

Operated from reasonable distance

Safe to operate

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22
Q

List 2 disadvantages of remote controls

A

Difficult to use if user has limited hand/wrist movement

Easy to block signal

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23
Q

List 2 uses of a joystick

A

Video games

Simulators

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24
Q

List 2 advantages of joysticks

A

Easier than keyboard to navigate

Control is more realistic

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25
Q

What is a disadvantage of a joystick

A

More difficult to control

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26
Q

List 2 uses of a driving wheel

A

Video games

Simulators

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27
Q

List 2 advantages of a driving wheel

A

Easier than keyboard/joystick to control steering movements

Driving experience

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28
Q

List 3 disadvantages of a driving wheel

A

Expensive
Movements can be too sensitive
Unless it’s an expensive simulator - feedback to the driving wheel is non-existent

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29
Q

List 8 uses of touch screens

A 
Self-service tills
ATMs
POS
PDAs (Personal digital assistants)
Public information systems at airports
Interactive whiteboards 
CBT (Computer-based training)
output device - can also be flat-screen monitor
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30
Q

List 3 advantages of touch screens

A

Faster entry of options
Easy method to choose options
User-friendly

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31
Q

List 3 disadvantages of touch screens

A

Limited number of options
Lead to problem if user has RSI
Screen can get dirty

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32
Q

What is a “Scanner”

A

Enter information from hard copy into a computer

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33
Q

List 4 uses of scanners

A

Scan documents
Scan in old/valuable documents - protects originals
Scan photographs
Scan barcodes

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34
Q

List 3 advantages of scanners

A

Images can be stored for editing
Much faster and more accurate than typing in documents
Possible to recover damaged documents

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35
Q

List 2 disadvantages of scanners

A

Quality can be limited

Can be slow at scanning

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36
Q

List 4 advantages of digital cameras

A

Easy to produce good quality photos
Faster to upload
No need to develop film and print out photos
Memory cards can store several hundred photographs

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37
Q

List 4 disadvantages of digital cameras

A

Computer literate
Artistry lost
Resolution isn’t good
Images need to be compressed to reduce amount of memory used

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38
Q

List 2 advantages of using DV (Digital Video) cameras over traditional video cameras

A

Easy to manipulate video footage using specialist software

DV format gives higher quality of image

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39
Q

List 4 uses of microphones

A

Input speech
Input voice recognition
Sensor to pic up sound (alarm system)
Video conferencing or VoIP

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40
Q

List 3 advantages of microphones

A

Faster to read text
Can manipulate sound in real life
Improving safety if used in voice-activation system

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41
Q

List 2 disadvantages of microphones

A

Sound files can use up computer memory

Voice recognition isn’t accurate

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42
Q

What are temperature sensors used for

A

Auto washing machines
central heating systems
automatic glasshouses
Ovens

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43
Q

What are pressure sensors used for

A

burglar alarm systems
washing machines
robotics
environmental monitoring

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44
Q

What are light sensors used for

A

automatic glasshouses, automatic doors
burglar alarm systems
street lighting
control

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45
Q

What are sound/acoustic sensors used for

A

burglar alarm systems monitoring liquid

powder flow in pipes

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46
Q

What are humidity/moisture sensors used for

A

automatic glasshouses
environmental monitoring
used in factories where
moisture levels are crucial

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47
Q

Where are pH sensors used for

A

automatic glasshouses
chemical processes
environmental monitoring

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48
Q

List 3 advantages of sensors

A

Accurate readings
Continuous
Automatic

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49
Q

What is a disadvantage of sensors

A

Spurious results

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50
Q

List 3 uses of a graphics tablet

A

Drawings
Input faster than typing
CAD

51
Q

List 3 advantages of graphics tablet

A

Possible to modify drawings after input
Accurate
Record pressure

52
Q

List 5 disadvantages of graphics tablet

A 
Expensive
Longer to produce
Menus aren't user-friendly
Larger drawings
Touch screens are damaged easily
53
Q

List 2 uses of webcams

A

Personal way of chatting online

Video conference

54
Q

List 2 advantages of webcams

A

Left on constantly

Allow people to keep in contact

55
Q

List 2 disadvantages of webcams

A

Limited features

Need to be connected to computer

56
Q

List 2 uses of lightpens

A

Selecting objects on CRT screen

Drawing on screen

57
Q

List 3 advantages of lightpens

A

Greater accuracy
Small
Easy-to-use tech

58
Q

List 4 disadvantages of lightpens

A

Lag
Only works on CRT monitors
Bad accuracy
Dated tech

59
Q

List 2 uses of magnetic stripe readers

A

Credit cards for ATM

Security device

60
Q

List 6 advantages of magnetic stripe readers

A 
Fast data entry
Error free
Secure
Prevents access to restricted areas
Not affected by oil/water/moisture
No moving parts - physically robust
61
Q

List 3 disadvantages of magnetic stripe readers

A

If it gets damaged, data is lost
Doesn’t work at a distance
Information isn’t human readable

62
Q

List 5 advantages of contactless card readers

A

Faster transaction
The system uses 128-bit encryption to protect data
Customers do not have to worry about typing errors
Retailers no longer have access to the customer’s credit/debit card information
The chip in the contactless credit card responds to the payment terminal reader with a unique number used for that transaction only

63
Q

List 5 disadvantages of contactless card readers

A

They are more expensive than normal credit/debit cards
A thief with a suitable reader could monitor your con tactless card transaction
while standing at the counter with you
Can take money twice if the customer uses it as a chip and PIN card
Transactions are usually limited to a small maximum value
Transactions have been carried out without the card holder being aware of this while they were just standing in the payment queue

64
Q

What is a use of chip and pin readers

A

Payments

65
Q

List 2 advantages of chip and pin readers

A

Secure

Robust

66
Q

What is a disadvantage of chip and pin readers

A

Fraud

67
Q

What is RFID

A

Radio Frequency Identification Reader

68
Q

List 4 uses of RFID

A

Livestock tracking
Retail
Several tags can be read at the same time, thus
speeding up the checkout process
Admission passes
Libraries - no need to scan barcodes or magnetic stripe cards, making the process quicker and more accurate).

69
Q

List 5 advantages of RFID

A

No line-of-sight contact is necessary; the tags can be read from a distance
It is a very robust and reliable technology.
Very fast read rate
Bidirectional data transfer
Bulk detection is possible

70
Q

List 4 disadvantages of RFID

A 
Tag collision (this is when the signals from two or more tags overlap
interfering with each other).
Because RFID uses radio waves, they are relatively easy to jam or interrup
It is relatively easy to hack into the data/signal transmitted by the tag.
RFID is more expensive than a comparable barcode system
71
Q

What is MICR

A

Magnetic ink character recognition

72
Q

What is a use of MICR

A

Process cheques at a bank

73
Q

List 3 advantages of MICR

A

Greater security
No manual input - no errors
Magnetic ink can be read if somebody writes over them

74
Q

List 2 disadvantages of MICR

A

Only certain characters can be read

More expensive than other methods used in DDE (Direct Data Entry)

75
Q

What is OMR

A

Optical Mark Recognition/reader

76
Q

What is a use of OMR

A

Read questionnaires/multi choice exam papers

77
Q

List 3 advantages of OMR

A

Fast input
Accurate - no typing
More accurate than OCR methods

78
Q

List 2 disadvantages of OMR

A

Forms need to be carefully designed to make sure marks are correctly positioned to gather accurate information
Can be problems if forms haven’t been filled correctly

79
Q

What is OCR

A

Optical Character Recognition

80
Q

What is a use of OCR

A

Processing passports and identity cards

81
Q

List 2 advantages of OCR

A

Fast data entry

No manual data entry - no errors

82
Q

List 2 disadvantages of OCR

A

Difficulty reading handwriting

Not very accurate technique

83
Q

List 2 uses of barcode readers

A

Supermarkets
Libraries
Safety function in companies

84
Q

List 4 advantages of barcode readers

A

Faster than keying in data
Records data - safety
Auto stock control
Trusted tech

85
Q

List 3 disadvantages of barcode readers

A

Expensive
Not foolproof
Can be easily damaged than RFID tags or magnetic strips

86
Q

What is QR code

A

Quick response code

87
Q

List 2 advantages of QR codes

A

No need for user to write down/key in website address - auto by scan
Stores website addresses/URLs that appear

88
Q

What is CRT monitor

A

Cathode Ray Tube monitor

89
Q

List 2 uses of CRT monitors

A

Primary output device

Lightpens

90
Q

List 2 advantages of CRT monitors

A

Angle of viewing is better than TFT monitors

Work with light pens

91
Q

List 4 disadvantages of CRT monitors

A

Heavy
Run very hot
Consume more power
Flicker - causes headaches

92
Q

What is TFT monitor

A

Thin film transistor monitor

93
Q

List 2 uses of TFT monitors

A

Primary output device

Integral part of laptop computers

94
Q

List 3 advantages of TFT monitors

A

Lightweight
Less glare
Less power consumption

95
Q

List 2 disadvantages of TFT monitors

A

Angle of viewing is critical

Definition isn’t as good at CRT monitor

96
Q

What is LCD monitor

A

Liquid crystal display/diode

97
Q

What is LED monitor

A

Light emitting diode

98
Q

What is CCFL

A

Cold Cathode Fluorescent Lamp

99
Q

What is “Multimedia projectors”

A

Receive signals that can be analogue or digital

100
Q

List 3 uses of multimedia projectors

A

Training presentation
Advertising presentations
Home cinema systems

101
Q

List 2 advantages of multimedia projectors

A

Enables people to see presentation rather than crowding around a computer screen
Avoids need for several networked computers

102
Q

List 3 disadvantages of multimedia projectors

A

Images may be fuzzy at times
Expensive
Setting up projector can be difficult

103
Q

What is a “Laser printer”

A

Produces high quality hard copy output

104
Q

List 2 uses of laser printers

A

Used where low noise is requried

Best for fast, high quality, high volume printing

105
Q

List 3 disadvantages of laser printers

A

Only fast if several copies are made
Colour are more expensive
Produces ozone and volatile organic compounds

106
Q

What is an “Inkjet printer”

A

Produces good quality hard copies

107
Q

List 3 uses of inkjet printers

A

Low output volumes are required
Best for high quality printing
3D inkjet printers are now being used in industry to produce protypes

108
Q

List 4 advantages of inkjet printers

A

High quality output
Cheaper to buy than laser printers
Lightweight small footprint
Doesn’t produce ozone and volatile organic compounds

109
Q

List 4 disadvantages of inkjet printers

A

Slow output if several copies are needed
Can’t do large print jobs
Printing can smudge
Can be expensive

110
Q

What is a “Dot matrix printer”

A

Type of impact printer where print head presses against inked ribbon

111
Q

List 2 uses of dot matrix printers

A

Noisy environment

Environment where impact printers are of value (producing wage slips)

112
Q

List 4 advantages of dot matrix printers

A

Can be used in environments that are dirty (not applicable for inkjet and laser)
Carbon copies/multi-part outputs can be produced
Cheap to run and maintain
Easy to use

113
Q

List 3 disadvantages of dot matrix printers

A

Very noisy
Costs more than injket to buy initially
Very slow and poor quality printing

114
Q

What is a “3-D printer”

A

Can produce solid objects that actually work

115
Q

What is the use of “Direct 3-D printing”

A

Uses inkjet technology

116
Q

List 5 advantages of 3-D printing

A

Possible to produce any product a user wants
Manufacture items quickly
Less cost compared to labour and other costs
Medical benefits (prosthetic)
Parts for machinery that can no longer be made can be manufactured using 3D printers

117
Q

List 3 disadvantages of 3-D printing

A

Potential to make counterfeit items that infringe others’ copyright
Can create anything with a 3-D printer - dangerous
Job losses

118
Q

List 3 uses of speakers

A

Output sound
Play downloaded sound files
Audio output of text on the screen that helps users with disabilities

119
Q

What is an “Actuator”

A

Transducers used to take signals from a computer and converts them into some form of motion (motors/pumps/switches/valves)

120
Q

List 3 uses of an actuator in a motor

A

Auto washing machines
Control robot arms in industry
Computers to control fans/disk drives/DVD drives

121
Q

List 2 uses of an actuator in a buzzer

A

Cookers/ovens

Burglar alarm system

122
Q

List 2 uses of an actuator in a light

A

Security lights

Glasshouse to connect lightning conditions

123
Q

List 4 uses of an actuator in a heater

A

Auto washing machines to heat up water
Auto control temperature
Control heating in a central heating system
Temperature control in an auto glasshouse

ICT (2 decks)

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