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Ict > Unit 3 > Flashcards

Unit 3 Flashcards

1
Q

Name 9 input devices

A
  • Keyboard
  • Mouse
  • Tracker pad
  • Joystick
  • Touch screen
  • Microphone
  • Scanner
  • Digital Camera
  • Graphics digitizer
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2
Q

What are concept Keyboards

A

Concert keyboards have keys with pictures or words and ar used to carry out specific instructions

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3
Q

Name one use of a joystick

A

It is used to play computer games

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4
Q

Where can a touch screen be used

A
  • Banks
  • Museums
  • Supermarkets
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5
Q

4 features of a keyboard

A
  • Used a standard layout, QWERTY
  • Depends on the human operator for speed of input
  • Is prone to human error since all data is keyed in
  • Is used to enter text into the computer
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6
Q

4 features of a mouse

A
  • Also referred to as a ‘pointing device’
  • Is easy to use and inexpensive compared to other input devices
  • Is designed to fit under the human hand
  • Contains 2 or 3 buttons which are used to make selections ions on the screen
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7
Q

3 features of a tracker pad

A
  • Known as a ‘touch-sensitive’ pad
  • Used as an alternative to a mouse on a laptop computer
  • Ideal for a portable device as it can be used in a confined space
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8
Q

3 features of a joystick

A
  • Allows the user to control an object on the screen by maneuvering a small lever in different directions
  • Senses movements which are converted to co-ordinates
  • usually has pre-programmed buttons to allow actions to be carried out
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9
Q

4 features of a touch screen

A
  • Minimal user training required
  • no additional hardware required
  • more expensive then a normal LCD screen
  • special type of screen which reacts to his man touch
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10
Q

4 features of a microphone

A
  • designed to input sound or human voice into a computer system
  • Used in voice-recognition applications
  • Background noice can interfere with spoken words
  • Can record music and store in digital format
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11
Q

4 features of a scanner

A
  • Converts a hard copy of pictures or text into a digital image
  • beams of bright light are passed over the image which is recognized as a series of dots in a page
  • once an image has been scanned it can be saved and edited using standard software
  • If text is scanned it can be recognized by a word processor using optical character recognition
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12
Q

3 features of a digital camera

A
  • stores picture in a memory card
  • A small LCD screen is attached to view pictures taken immediately
  • Pictures can be downloaded to a computer connected to the camera with USB cable or a wireless connection
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13
Q

What does LCD stand for

A

Liquid Crystal Display

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14
Q

What does OCR stand for

A

Optical Character Recognition

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15
Q

3 features of a graphics digitiser

A
  • A flat electronic sensitive surface that captures the image drawn with a stylus pen
  • Allows the user to record a hand-drawn image in a computer system
  • Th image drawn can be imported to a graphics package for further editing
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16
Q

Name 6 output devices

A
  • Visual display unit
  • Impact printer
  • Laser Printer
  • Inkjet printer
  • Plotter
  • Speaker
17
Q

What does VDU stand for

A

Visual Display Unit

18
Q

4 features of a VDU

A
  • Displays information or output from the computer on the screen
  • The cost of the monitor increases as size and resolution gets bigger
  • An LCD screen is much lighter and smaller then a typical desktop
  • Some VDUS have inbuilt speakers and microphone making them suitable for multimedia purposes
19
Q

Define pixel

A

A pixel is the smallest area on the screen that can be edited. A picture is mad up from a number of pixels

20
Q

Define screen resolution

A

Screen resolution is a measure of the quality of the image on the screen. The more ou les the higher the resolution

21
Q

What does CRT stand for

A

Cathode Ray Tube

22
Q

Another name for the impact printer

A

Impact, Dot-matrix, printer

23
Q

4 features of an impact printer

A
  • Prints only in one color
  • Costs less to produce multiple copies of data
  • Produces low-quality print compared to a laser printer
  • Can be noisy in the work place
24
Q

What can a laser printer, three in one device do

A
  • Scan
  • Photocopy
  • Fax capabilities
25
Q

4 features of a laser printer

A
  • Can print in black and white or color
  • Is suitable for high-volume printing e.g school network
  • Produces excellent print quality compared to other printers
  • Workers at greater speeds than other printers
26
Q

4 features of an inkjet printer

A
  • Can print in black and white or colour
  • Is suitable for home use to print photographs and small volumes of documents
  • Has high-quality print which slows down the speed of output
  • Is slow at producing output compared to a laser printer
27
Q

4 features of a plotter

A
  • Produces high-quality accurate and entailed diagrams
  • Is used by architects, surveyors, pattern makers and engineers
  • Can use a variety of paper sizes
  • Can draw characters of different sizes and different fonts to be added to the drawings
28
Q

4 features of a speaker

A
  • small internal speakers are standard in computers
  • provides sound output through the sound card from a computer
  • can output music as well as the spoken word
  • is useful for the visually impaired

Ict (9 decks)

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