1
Q
What is an Input device?
A
Hardware devices that allow data to be entered into a computer
2
Q
Describe the difference between manual and direct input devices
A
Manual means that data is input into the computer by hand but Direct means data is input into the computer directly by a machine
3
Q
What are the uses and characteristics of a keyboard?
A
Input of data into applications software and typing in commands into the computer.
Wired or wireless
4
Q
What are the advantages of a keyboard?
A
- Fast entry of new text into document
- Well known method
- Easy to use for most people
- Easier to do verification checks as data is entered
5
Q
What are the disadvantages of a keyboard?
A
- Can be difficult to use if the user has limited arm/wrist use
- Slow method when compared to direct data entry
- Fairly large device that requires valuable desk space
6
Q
What are the uses and characteristics of a numeric keypad?
A
Automatic teller machines, Point of sale terminals, chip and pin devices.
- Faster to use when entering numbers
- Can fit into smaller devices as it is small
7
Q
What are the advantages of a numeric keypad?
A
- Faster than standard keyboards when entering numerical data
- Because many are small devices they are very easy to carry around
8
Q
What are the disadvantages of a numeric keypad?
A
- Sometimes have small keys which can make the input more difficult
- Sometimes the order of the numbers on the keypad is not intuitive
9
Q
What are the uses and characteristics of a mouse and a tracker ball mouse?
A
Opening and closing and minimising software, grouping, moving and deleting files, controlling the position of a pointer on the screen to allow a selection
The tracker ball mouse is good for accessibility, used by moving the ball around and has left ad right middle mouse button
Wireless or wired
- Trackball mouse allows the mouse not to be moved by using the ball
- Mouse are measured in dots per inches and
- Tracker ball can be a good alternative for people with conditions such as RSI
The tracker ball mouse is good for accessibility, used by moving the ball around and has left ad right middle mouse button
10
Q
What are the advantages of these mouses?
A
- Faster method for selection than using a keyboard
- Very quick
- Does not need a large desk area
- Trackball mouse allows the mouse not to be moved by using the ball
- Mouse are measured in dots per inches and
- Tracker ball can be a good alternative for people with conditions such as RSI
11
Q
What are the disadvantages of these mouses?
A
- Can be more difficult for people with disabilities
- Difficult to use if no flat surface readily available
- The ball will get dirt in it easily and can be removed easily
12
Q
What are the characteristics of a touchpad?
A
Opening and closing and minimising software, grouping, moving and deleting files, controlling the position of a pointer on the screen to allow a selection
13
Q
What are the advantages of a touchpad?
A
- Faster method for selection than using a keyboard
- Very quick
- Does not need a large desk area
- Because the touchpad is integrated into the laptop computer there is no need for a separate mouse
14
Q
What are the disadvantages of a touchpad?
A
- People with a limited handwrits harder to use
- More difficult to use when preforming certain operations such as a drag and drop
15
Q
What are the uses of a remote control?
A
Changing the channel on the tv, Increasing/ decreasing the volume on a music player, Selecting a different chapter on a DVD player, operate machinery, how entertainment systems use remote controls
16
Q
What are the advantages of a remote control?
A
- Can be operated without even going to them, useful for people with disabilities
- Operate devices that are in an unsafe environment
17
Q
What are the disadvantages of a remote control?
A
- People with limited hand movement can find them difficult to use
- The infra-red signal between the remote control and the device it operates can become blocked
18
Q
What are the uses of a joystick?
A
They can control characters or objects in video games, can control industrial machinery, they are used in simulators
19
Q
What are the advantages of a joystick?
A
- Easier to control on-screen cursor or movie in game character than when it is using a keyboard
- Very simple to get used to
- Can be used by disabled people
20
Q
What are the disadvantages of a joystick?
A
- Not as easier to control an on-screen curser when compared to a mouse
- People with hand/wrist issues can find them painful to use
- Difficult to enter text
21
Q
What are the uses of a touch screen?
A
Way of saving space, public information systems at airports, Interactive whiteboards at school, On-screen multiple choice tests
22
Q
What are the advantages of touch screen?
A
- Very fast an easier to enter options
- No training needed
23
Q
What are the disadvantages of touch screen?
A
- Limited number of options available on screen
- Expensive compared to other input devices
- Screen can become dirty and full of germs due to people touching it
24
Q
What are the uses of a scanner?
A
Used to scan hard copies/ printed documents into a computer, Old documents and photos can be scanned into a computer for work or memories
25
What are the advantages of a scanner?
- Very fast to enter hard copies
- Very easy to scan and store documents and images into a computer
- Old photos that may be damaged can be repaired
26
What are the disadvantages of a scanner?
- Scanned images are usually of lesser quality
- Scanned images can take up a lot of disk space
27
What are the uses of a graphics tablet?
Allow designers to produce digital images much more accurately
28
What are the advantages of a graphics tablet?
- Much easier to draw images using a pen then using mouse
- Useful in countries when drawing symbols and numbers
29
What are the disadvantages of a graphics tablet?
- Very expensive when compared to a mouse
- Not useful for some input deeds
30
What are the uses of a light pen?
Selecting objects on a CRT screen, directly drawing on a screen
31
What are the advantages of a light pen?
- More accurate than touch screens
- Very small so can be used where there is no room for a mouse
32
What are the disadvantages of a light pen?
- Not as accurate as a graphics tablet when producing drawings
- Can only be used with CRT screens
- Can be quite uncomfortable to use as you have raise your hand
33
What are the uses of a microphone?
Used to input sounds/speech for use in range of applications, used in voice recognition, allow people to hols calls
34
What are the advantages of a microphone?
- Faster to read in text than write it
- Makes driving safer instead of text messaging use calls
- Very cheap to buy
35
What are the disadvantages of a micrphone?
- Can take up a lot of computer storage
- Not as accurate as typing
- Background noises can interfere
36
What are the uses of a digital camera?
Used to capture digital images, easier to transfer images to a computer, Images can be printed easily, high-quality video clips
37
What are the advantages of a digital camera?
- No film to develop
- Easily be deleted
- Easy to make lots of copies
- No need to print at all because images can be viewed using computer
38
What are the disadvantages of a digital camera?
- User needs to have computer skills
- Not all of the cameras can produce high quality images
39
What are the uses of a webcam?
Used to conduct face to face job interviews, hold video conferences, cam capture image and video content, sometimes used by parents to keep an eye on their children
40
What are the advantages of a webcam?
- Allow long distance face to face e.g. Different countries
- Video conferences, job interviews for a cheap price
- Left running constantly
41
What are the disadvantages of a webcam?
- Fixed position
- Image/video quality can be poor
- Permanently fixed to a computing device
42
What is a direct data entry device?
A device that requires less human interaction in order to get data into a computer
43
What are the uses and characteristics of magnetic stripe readers?
Category: Card reader
Reads information from magnetic stripes found on bank cards, membership cards and hotel door cards
- ATM'S use these readers to process the information on bank cards
EFTPOS (electronic funds transfer point of sale) use the readers to transfer customer's money from their bank accounts when they purchase goods in stores
44
What are the advantages of magnetic stripe readers?
- Entering the data is very fast
- No possibly of data entry errors as there is no typing involved
- The stripes on cards are not affected by water and so quite robust
45
What are the disadvantages of magnetic stripe readers?
- The magnetic stripes on cards can only hold a small amount of data
- The cards need to be in contact with the reader in order to be used
- If the stripe get damaged then the data is lost
46
What are the uses and characteristics of Chip and Pin readers?
Category: Card reader
Allow people to pay for goods and pay for services electronically at EFTPOS terminals. Works by inserting a bank card into a slot and then entering a pin
Used to make secure payments for goods/services in places such as:
-Supermarkets
-Restaurants
-Cafes
-Buying petrol
47
What are the advantages of Chip and Pin readers?
- More secure than magnetic stripe readers as the user needs to know the correct pin
- Information contained on the chip is harder to clone than it is to copy magnetic stripes
- Chips can hold more data
- They are portable
48
What are the disadvantages of Chip and Pin readers
- It is possible to forget your pin which means you cannot make payments
- Shoulder surfing
49
What are the uses and characteristics of contactless debit card readers?
Category: Card Reader
Allow customers to pay worth up to a certain amount of money without entering their pin. All contactless debit cards have a small chip inside them that emits radio waves
Commonplace uses include transit tickets, bank cards and passports.
50
What are the advantages of contactless debit card readers?
- Faster transactions
- The contactless card system uses a 128-bit encryption system to protect the data
- Customers do not have to worry abut typing in errors
- Retailers no longer have access to the customers card information
51
What are the disadvantages of contactless debit card readers?
- They are more expensive than normal debit/credit cards
- A thief with a suitable reader could monitor your transaction
- Can take money twice
- Limited to small (max) value
52
What are the uses and characteristics of radio frequency identification?
Category: Scanning Device
The RFID is made rom two components: a microchip that stores and processes information and an antenna which is used to receive and transmit data/information
- Livestock tracking
- Retail
- Admission passes
- Libraries
53
What are the advantages of radio frequency identification?
- No line-of -sight contact is necessary; the tags can be read from a distance
- It is a very robust piece of technology and also reliable
- Very fast read-rate
- Bulk detection is possible
54
What are the disadvantages of radio frequency identification?
- Tag collision
- Easy to jam or interrupt due use of radio waves
- Relatively easy to hack into the data/signal transmitted by the tag
- More expensive than barcode system
55
What are the uses and characteristics of Optical Mark Recognition?
Category: Scanning Device
Is a device that can read marks written in pen or pencil on a form
- Used to read questionnaires
- Multiple-choice examination papers
- Voting papers
56
What are the advantages of Optical Mark Recognition?
- Very fast way of inputting results on a survey
- Because there is no typing they are more accurate than keying in data
- They are more accurate than OCR methods
57
What are the disadvantages of Optical Mark Recognition?
- The forms need to be carefully designed to gather accurate information
- There can be problems if not filled in correctly
58
What are the uses and characteristics of Optical Character Recognition?
Category: Recognition Reader
Is the name given to a device that convers text on hard copy documents into an electric form
- Processing of passports and identifying cards
- Used in automatic plate recognition
- Digitising historic newspapers and rare books so they can be archived and researched
59
What are the advantages of Optical Character Recognition?
- It is much faster data entry system than manually keying in the data
- The number of errors is reduced because there is no manual data entry
60
What are the disadvantages of Optical Character Recognition?
- The system has a difficulty reading some handwriting
- Still not a very accurate technique
61
What are the uses and characteristics of barcode readers?
Category: Scanning Device
Are used to read information in the form of a barcode
- Used in supermarkets and other shops to identify an item
- Used in libraries to keep trach of book loans
- Used as a safety function in many companies
62
What are the advantages of barcode readers?
- Much faster than keying in data manually and fewer mistakes
- If used in a way of recording safety testing of components thay can help improve the safety
- They allow automatic stock control
- They are tried and trusted technology
63
What are the disadvantages of barcode readers?
- Relatively expensive system to administer
- Not fool-proof
- Can be more easily damaged
64
What are the uses and characteristics of Quick Response Code Scanners (QR Codes)?
Category: Readers
Consists of small squares known as pixels which can be encoded within the QR code to hold a web address to advertise something
- Used in advertising to contain data such as business addresses
- Contain links to apps
- Wi-Fi authentication
- Used to establish virtual online stores
65
What are the advantages of QR codes?
- They can hold much more information than normal barcodes
- There ill be fewer errors within the barcodes
- They are easier to read
- It is easy to transmit QR codes
- You can encrypt QR codes
66
What are the disadvantages of QR codes?
- More than one QR code format is available
- Can be used to transmit malicious codes known as tagging
67
What are the uses of a CRT (Cathode Ray Tube) Monitor?
- The screens are usually very large to enable complex diagrams to be created or modified
- They are used with light pens to allow designs to be created on screens
68
What are the advantages and disadvantages of a CRT monitor?
Advantages:
- The screen can be clearly seen at a wider range
- They allow the use of light pens in, for example CAD/CAM applications
Disadvantages:
- They tend to be rather heavy and present a weight hazard is not supported properly
- They run very hot and can cause fires
69
What are the uses of a LED/LCD monitor?
- Used as the main output device for most modern computers
- They offer touchscreen input
- Mobile phones, tablets, laptops, and portable video games all use LCD screens
70
What are the advantages and disadvantages of LED/LCD monitors?
Advantages:
* Very efficient, low power consumption
* Lightweight devices
. Can be made in large variation of size
Disadvantages:
* Motion blur is a common issue
. Colour and contrast from various viewing angles can be inconsistent
71
What are the uses of a multi media projector?
* Training presentations
* Advertising presentations
. Home cinema systems
72
What are the advantages and disadvantages of multi media projector?
Advantages:
* Enables many people to see a presentation rather than crowding around a small computer
* Avoids the need for several networked computer
Disadvantages:
* Images can sometimes be fuzzy
* Expensive to buy
* Setting up projector can be a little bit difficult
73
What are the uses of laser printers?
* They are used where low noise is required
. If fast, high-quality, high-volume printing is required then laser printers are the best options
74
What are the advantages and disadvantages of laser printers?
Advantages:
* Printing is fast
* They can handle very large print jobs
* The quality is consistently high
. Toner cartridges last for a long time
Disadvantages:
* Only really fast if several copies are being made
. Colour laser printers tend to be expensive to run
75
What are the uses of an inkjet printer?
* Used where low-input volumes are required
* If high quality printing is required for single pages
76
What are the advantages and disadvantages of inkjet printers?
Advantages:
* High-quality outputs
* Cheaper to buy than laser printers
. Very lightweight and have a small physical footprint
Disadvantages:
* Cannot do large print jobs
* Printing can smudge if the user Is not careful
. Can be expensive if used a lot
77
What are the uses of dot matrix printers?
* They can be used in dirty or noisy environments
* Still widely used in till receipts
. Used in applications or forms
78
What are the advantages and disadvantages of dot matrix printers?
Advantages:
* Very cheap to run and maintain
* Carbon copies or multi-part outputs can be produced
. Easy to use if continuous stationery is required
Disadvantages:
* Very noisy
* Actually cost more than an inkjet printer to buy initially
. Very slow, poor quality printing
79
What are the uses of graph plotters?
* Producing engineering drawings
. Drawing animation characters
80
What are the advantages and disadvantages of graph plotters?
Advantages:
* Able to print on a variety of materials as well as paper
. Able to produce large, monochrome and colour drawings to a high accuracy
Disadvantages:
* Very slow at printing
. Expensive equipment to purchase initially
81
What are the uses of 3D printers?
* Prosthetic limbs can be made to exactly fit on the injured bone
* Fashion and art
. Making parts for items no longer in the production
82
What are the advantages and disadvantages of 3D printers?
Advantages:
* The manufacturing of items has become much easier than ever before
* Rapid prototyping
. Medical benefits are emerging from this
Disadvantages:
* Can lead to dangerous or illegal activities
. There is the potential of job losses
83
What are the uses of an actuator?
* They are used to control monitors, pumps, switches, buzzers and so on
. They allow computer to control physical devices that normally require analogue inputs
84
What are the advantages and disadvantages of actuators?
Advantages:
* They allow remote operation of many devices
. They are relatively inexpensive devices
Disadvantages:
* They are an additional device in the system that could go wrong
. Because they are usually analogue devices, computer signals need to be converted using a DAC to enable computer control
4th Form ICT Mock Revision
flashcards
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# Cards
