Topic 1: Input & Output

Question 1

3 pointing devices

Answer 1

1. mouse (optical and touch)
2. touchpad
3. trackball

Question 2

optical reader

Answer 2

• use light source to read character, mark and code and converts it into digital data that can be process by computer
• exp. Optical Character/Mark Reader

Question 3

how scanner works

Answer 3

1. document is facing the glass window and start scanning
2. scanner convert the content into digital information
3. information transmitted through the cable to computer’s memory
4. saved in hard drive

Question 4

how RFID (Radio Frequency Identification) works?

Answer 4

• read information from the tag via radio wave

Question 5

Uses of RFID

Answer 5

1. tollway system - tracking payment
2. library - checking out books
3. hospital - tracking location
4. marathon - tracking time
5. managing purchases

Question 6

how Magstripe Reader works?

Answer 6

• read information encoded in the magnetic stripe on the back of the card

Question 7

Define output

Answer 7

data that has been process into useful form

Question 8

4 types of output

Answer 8

1. video
2. audio
3. texte
4. graphic

Question 9

3 types of monitor

Answer 9

1. CTR (cathode-ray)
2. LCD
3. LED

Question 10

quality of display

Answer 10

• resolution
• response time
• contrast ratio
• dot pitch
• brightness

Question 11

Define input

Answer 11

any data or information entered to the computer’s memory

Question 12

how Ink-Jet Printer works?

Answer 12

by spraying tiny drops of liquid ink onto the paper

Question 13

Pros of laser printer

Answer 13

• high speed
• high quality
• black and white
• colour

Question 14

Thermal printer

Answer 14

pushing electrical heated pins onto the heat-sensitive paper

Question 15

2 assistive technologies

Answer 15

1. camera/receiver and head-mounted printer
2. braille printer