Computer Hardware

Question 1

Give some examples of Input devices

Answer 1

Keyboard, Mouse, Chip and Pin reader, Microphones, Graphics Tablet, Web Cams, Image scanners, Sensors, Barcode Reader, Touch Screen

Question 2

Give some examples of Input devices that can help those with a disability?

Answer 2

Braille keyboard, Eye Type, Foot Mouse, Puff-suck Switch, Screen reader, voice synthesizer, Actuators.

Question 3

Advantages and Disadvantages of a Keyboard?

Answer 3

Adv:
- fast entry of new text into a document
- people are well practiced with them
- easy verification checks as data appears on the screen immediately.​
Disadv:
- User with restricted arm/wrist find difficult.
- Entering data is slow compared to direct data entry (Optical Character Recognition)​.
- Take up desk space

Question 4

Advantages and Disadvantages of a Numeric keypads? Also give some uses?

Answer 4

Uses:
- Automatic Teller Machines (ATM’s) to put in their personal identification number (PIN)
- On Phones so that numbers can be entered.
- Electronic Point of Sales (EPOS) terminals in case barcode reader fails to read.
Adv:
- faster than standard keyboards to enter numeric data​
- very easy to carry around e.g phones and pin readers
Disadv:
- Small keys can make it difficult to use
- Hard to use when entering text

Question 5

Advantages and Disadvantages of a mouse?

Answer 5

Adv:
- faster to select an option using a mouse than with a keyboard
- rapid navigation through applications and the internet
- take up little space
Disadv:
- people with restricted hand/wrist movement can find it hard to use
- easily damaged and older ones can get clogged up with dirt
- difficult to use if there is no flat surface ​