3.2 - Input and Output Devices Flashcards
1
Q
Where are barcode scanners used? [2]
A
- retail stores
- office buildings
2
Q
What are barcode scanners used for? [1]
A
- to capture product information so that it can be added to the customer’s purchase total
3
Q
Where are digital cameras used? [3]
A
- scientific
- photography
- medical
4
Q
Why are digital cameras used? [2]
A
- they have sharper and better detail than film cameras
- used to make digital recordings of images
5
Q
Where are keyboards used? [2]
A
- laptops
- personal computers
6
Q
Why are keyboards used? [2]
A
- used as a text entry interface for typing letters, numbers and symbols into application softwares
7
Q
Where are microphones used? [3]
A
- telephones
- hearing aids
- public address systems for concert halls
8
Q
Why are microphones used? [2]
A
- to convert sound waves into an electrical signal
- makes voice louder
9
Q
Where is an optical mouse used? [2]
A
- office environments
- schools
10
Q
Why are optical mouses used? [3]
A
- used to move cursor
- select objects
- click on buttons
11
Q
Where are QR Code scanners used? [3]
A
- restaurants
- public transportation
- to link directly to download an app
12
Q
Why are QR code scanners used? [2]
A
- to track information about products in a supply chain
- shows product details
13
Q
Where is touchscreen used? [2]
A
- phones
- ipads
14
Q
Why is touchscreen used? [1]
A
- enables user to interact directly with what is displayed
15
Q
Where are 2D and 3D scanners used? [2]
A
- 3D printers
- airports
