Input and Output Devices Flashcards
What layout does a standard keyboard use?
QWERTY
What does EPOS stand for?
Electronic Point Of Sales
What does ATM stand for?
Automatic Teller Machine
Give an example of a keyboard that is designed for a specific application.
ATM
What is a concept keyboard?
A keyboard that has keys with pictures or words which are programmed to carry out specific instructions.
Give advantages of a keyboard.
Need little training, a skilled typist can enter data very quickly and often computers come with a keyboard supplied
Give disadvantages of a keyboard
It is prone to human error since all data has to be keyed in, if you cannot touch type it can be time consuming to enter data and excessive use can lead to RSI.
What does RSI stand for?
Repetitive Strain Injury
What can a mouse be described as?
A ‘pointing device’
Name 3 types of mouse
Infrared, mouse ball and wireless
Give advantages of a mouse.
Easy to use, inexpensive and designed to fit under the human hand.
State one disadvantage of a mouse.
Experienced users may find using a mouse slow, compared to using hot keys such as Crtl + P to print
Give a use for a joystick
Playing flight simulators
What does a joystick do as you manoeuvre it?
It senses movements and converts them into coordinates.
Apart from the lever, describe the other functionality that a joystick has.
It has a range of buttons that can carry out specific, pre-programmed actions
Give one advantage of a joystick
Provides a better experience when playing a flight simulator
Give one disadvantage of a joystick
Can break easily, if too much force is used to manoeuvre it
How does a tracker pad work?
It senses touch from a finger (it is touch sensitive)
What is a tracker pad an alternative to?
A mouse for a laptop
Give one advantage of a tracker pad
Useful for laptops when using a mouse is not practical
Give two disadvantages of a tracker pad
Cannot be used while wearing gloves, for example in a sterilised environment, and it may not always accurately interpret a user’s movement.
What type of screen is a touch screen more expensive than?
An LCD screen
State one use of a touch screen.
In a fast food restaurant for inputting a customer’s order
What is the main advantage of using a touch screen?
No additional hardware such as a keyboard or mouse is required
Give an advantage of a microphone
Voice recognition is useful to users with limited mobility, who can use their voice instead of a keyboard.
Give two disadvantages of a microphone
Background noise can interfere with spoken words, making it harder to use voice recognition applications. Software can also interpret spoken words incorrectly.
What does OCR stand for?
Optical Character Recognition
What input device uses OCR?
Scanner
What does OCR do?
It converts written words on paper into text that can be edited on a word processor.
Name the type of scanner commonly used in schools
Flatbed scanner
Give two advantages of a flatbed scanner
Very accurate and can produce high quality images, and once digitised, images can be enhanced with a graphics application
Give two disadvantages of a flatbed scanner
Images lose some quality during the scanning and digitising process, and images can take up a lot of memory space.
Name two components of a digital camera
A memory card and LCD screen
What is a megapixel?
One million pixels
Give two advantages of a digital camera.
Images taken can be viewed on the LCD immediately, and images can be edited and enlarged
Give two disadvantages of a digital camera.
They are generally more expensive than cameras which use film, and images often have to be compressed to avoid using too much memory.
