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ICT Ch2 Input And Output Devices > Input Devices > Flashcards

Input Devices Flashcards

1
Q

What are the uses of a keyboard?

A

1-Enters text using word processing document.
2-application where text has to be created

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2
Q

What are advantages of a keyboard?

A

1-Very reliable
2-Skilled typists input data quickly
3-cheap input device

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3
Q

What are the disadvantages of a keyboard?

A

1-Need typing skills
2-Time consuming, especially if user has not had enough practice
3-Cannot do diagrams or drawings

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4
Q

What are the uses of a Numeric keypad?

A

1-Application where only numeric data can be entered
2-Inserting PIN numbers using debit/credit cards (using an ATM for money withdrawal)

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5
Q

An example of a numeric keypad and its uses

A

Pinpad
1-Used at ATMs for money withdrawal
2-Used to pay the bill at retail stores

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6
Q

Advantages of numeric keypads

A

1-Easy and quick method to enter numbers
2-Easy to use by non literate people

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7
Q

Disadvantages of numeric keypads

A

1-Cannot input text
2-Limited functionality

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8
Q

Uses of pointing devices

A

Application for selecting data from menus list

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9
Q

3 Examples of pointing devises

A

1-Mouse
2-Touchpad
3-Trackerball

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10
Q

What are 4 Advantages of a mouse

A

1-Easy to use by non professionals
2-Not expensive
3-Quicker navigation then using arrow keys on a keyboard
4-Precise control

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11
Q

Name 5 Disadvantages of a mouse

A

1-Causes wrist strain after a while
2-Relatively slow for professional use
3-Cannot input text
4-Not accurate for drawing purposes
5-Needs a flat surface to operate

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12
Q

How does a Touchpad work?

A

It senses touch from a finger

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13
Q

Where is a Touchpad located

A

On a laptop

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14
Q

What are 2 functions of a Touchpad?

A

1-Saves work area that would be required by other pointing devices
2-Makes laptops more portable

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15
Q

2 Disadvantages of a touchpad

A

1-requires sensitive touch, which could be inconvenient for some people or environments
2-Cannot be used while wearing gloves

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16
Q

What are uses of a Trackerball?

A

1-Used with people with limited skills, such as children and disabled people
2-Used for medical equipment

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17
Q

What are 3 Advantages of a trackerball?

A

1-Easily used by Kids and Disabled people
2-Does not require free desk space like other pointing devices (mouse)
3-Reduces wrist pain

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18
Q

What are Disadvantages of a Trackerball?

A

1-Relatively slow for a professional user
2- Cannot input text
3- Limited availability
4- Less portable then some other pointing devices

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19
Q

What are uses of a Light pen

A

It’s a Drawing application that uses a graphical tablet
-for freehand drawings
-for retouching photographs

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20
Q

2 Advantages of a Light pen

A

1- People who have never used a computer adapt naturally to using a pen as an input device
2- Accurate for drawing purposes

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21
Q

A disadvantage of a Light pen

A

Only connects to a CRT screen

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22
Q

Uses of a Touch screen

A

Selecting from a limited list of options

Used in
- cafes
- Kiosks
- Tourism information
- Public transportation inquiries

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23
Q

3 Advantages of a Touch screen

A

1- User friendly and are easy to understand
2- Does not require an addition input device
3- Suitable for short answers or Yes/No responses

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24
Q

3 Disadvantages of a Touchscreen

A

1- Limited amount of data as only Yes/No responses can be made
2- Not suitable for office use
3- Unintentional touches on the screen could lead to errors

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25
Q

What are some uses of a remote control?

A

1-Used to enter data from a distance
2- to control devises such as
.DVD
.Recorder
.Music systems
.projectors

26
Q

2 Advantages of a Remote control

A

1- Provides convenience for user to work away from the system
2- Useful for disabled people

27
Q

2 Disadvantages of a Remote control

A

1- Can be easily misplaced
2- The remote and the system must be near each other with no obstacles between them

28
Q

Uses of a Joystick

A

1- Used by pilots in flight simulators
2- Used in car driving simulators
3- used to play computer games

29
Q

How does a Joystick work?

A

joystick moves and it senses it and converts it into coordinates

30
Q

Advantages of a Joystick

A

1- Allows fast interaction which is needed in computer games
2- Provides a better experience while playing computer games
3- Well built Joystick are very durable

31
Q

Disadvantages of a Joystick

A

1- Cannot be used to accurately select options from a screen
2- High quality Joysticks are expensive

32
Q

Uses of a Graphics tablet

A

1- Used to input
- freehand drawings
- Designs
2- To retouch photographs
3- To work with CAD
Uses stylus (I think)

33
Q

An Advantage of a graphics tablet

A

It can be used to accurately digitize drawings

34
Q

Disadvantages of a Graphics tablet

A

1- Expensive
2- not portable

35
Q

Uses of a Scanner

A

1- Entering hard copy pictures into a computer
2- Digitize documents
3- works with OCR (optical character reader)

36
Q

examples of a Scanner

A

Flat bed
Hand held

37
Q

Uses of a Flat bed scanner

A

Used to capture a full document

38
Q

Uses of a hand held scanner

A

Used to capture part of a document
It’s portable

39
Q

Advantages of scanner

A

1- Accurate
2- Gives high resolution
3- Fast method to capture printed photos as images

40
Q

Disadvantages of a Scanner

A

1- Scanned objects take up more storage space — Then objects that have been digitized by a graphics tablet
2- expensive

41
Q

What is an input devise?

A

It is any hardware device that allows the user to send data or instructions directly into the computer

42
Q

Can an input device receive data?

A

No, an input device can send data to another device but cannot receive data from another device

43
Q

Why are input devices fairly complicated?

A

Because they have to ensure the user can interact with the computer correctly

44
Q

Why are input devices necessary?

A

Computers need input devices to get commands and data from users.
The user controls the devices

45
Q

Uses of a Video camera

A

To input moving pictures into the computer

46
Q

Advantages of a Video camera

A

1- Photos can be input directly to the computer system
2- portable

47
Q

Disadvantage of a video camera

A

1- Expensive
2- Limited battery life

48
Q

Uses of a Web cam

A

To input moving pictures into a computer from a fixed position

used for video conferences

49
Q

Advantages of a Web cam

A

1- Not expensive
2- can be used for surveillance
3- allows face to face communication

50
Q

Disadvantages of a Web cam

A

1- Requires special software
2- must be located with a Pc
3- may not have the best audio quality

51
Q

Uses of a Microphone

A

1- Records voice for presentation
2- used in voice recognition
3- useful for disabled people to interact with the computer

52
Q

Advantages of a Microphone

A

1- No need for typing
2- Can be used by disabled people
3- can be used by those who have their hands occupied

53
Q

Disadvantages of a Microphone

A

1- Requires a quiet environment or it will pick up background noise
2- May cause echo if too quiet
3- May hear words wrong

54
Q

Uses of Sensors

A

Controls and measures application

55
Q

Examples of Sensors

A

1- Temperature sensor
2- Pressure sensor
3- Light sensor

56
Q

Uses of Temperature Sensor

A

1- Automatic washing machine
2- Automatic Cookers
3- environmental monitoring
4- computer controlled greenhouses

57
Q

Uses of a Pressure sensor

A

1- Burglar alarms
2- Environmental monitoring

58
Q

Uses of Light sensors

A

1- Burglar alarms
2- Environmental monitoring
3- Computer controlled greenhouse

59
Q

What use do Temperature, Pressure and Light sensors all have in common

A

They are all used for environmental monitoring

60
Q

Advantages of Sensors

A

1- Allow for automatic response to be executed without any human intervention
2- Allows continuous monitoring

61
Q

Disadvantages of sensors

A

1- If data logs break down some data could be lost
2- equipment is expensive
3- it need an ADC (analogue to digital converter) for it to be understood by the computer

ICT Ch2 Input And Output Devices (2 decks)

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