Input devices

Question 1

What are 4 features of a keyboard?

Answer 1

1. QWERTY key layout
2. Number pad
3. Function bar (f5)
4. Arrow keys

Question 2

What are keyboards used for?

Answer 2

To enter text into a computer system

Question 3

What are 3 different types of mice and how do they work?

Answer 3

1. Wired/wireless - use sensors
2. optical mouse - use LED
3. Laser mouse - more sensitive

Question 4

What are mice used for?

Answer 4

To assist with moving a cursor around a computer screen and selecting menu options and icons

Question 5

What are 2 features of a microphone?

Answer 5

1. records speech and sound when a user speaks into a mouse

2. It can be omni-direction to allow inernet/audio to be coverted

Question 6

What is the main use for a microphone?

Answer 6

entering audio, usually analogue. This is for users who have limited hand movement / difficulty speaking (google voice)

Question 7

Wat are 3 features of sensors?

Answer 7

1. A sensor collects mostly analogue input - moisture, heat, pressure
2. no human intervention is required
3. They are very accurate

Question 8

What is the main use of sensors?

Answer 8

To collect analogue data so that it can be processed by a computer system

Question 9

What are 2 features of a specialist keyboard and what is a virtual keyboard?

Answer 9

1. They have keys that are specific to the application they are required for (arabic keyboard)
2. they can be designed to suit the business application

A virtual keyboard is a keyboard that pops up on a screen

Question 10

Where can specialist keyboards be used?

Answer 10

1. in restaurants when entering keys for food items

2. in accountancy firms

Question 11

What are 4 features of remote controls?

Answer 11

1. Remote controls are designed to suit the application
2. They can be wired or wireless
3. They work using radio waves or infrared
4. The device they are operating needs to be in the line of sight

Question 12

What are remote contros used for

Answer 12

gaming, operating televisions and home entertainment companies

Question 13

What are two features of a scanner

Answer 13

1. a beam of light is passed over information to be captured according to the patterns of light that make up the info
2. They are available as hand-held or flat bed scanners
3. The scanned info can be edited provided there is a software that can convert the patterns of light into text. This is called OCR (optical character recognition)

Question 14

What are the main uses of scanners

Answer 14

1. They are used to enter large amounts of typed info and objects into computer systems
2. useful for entering info that does not need to be altered

Question 15

What are 2 features of digital cameras?

Answer 15

1. They take digital photographs that can be uploaded onto a computer system
2. the photographs can be saved onto a memory card inside the camera

Question 16

What are 4 features of magnetic strips and chip and PIN?

Answer 16

1. a magnetic strip is a black strip on a plastic card and tends to hold static info
2. Chip and PIN refers to a card with a microchip and a pin number that can process info
3. The PIN entered is checked to see if i =t matches the PIN registered to the chip. If they match, the required process can take place

Question 17

What are magnetic strips and Chip and PIN used for?1

Answer 17

1. bank/loyalty card

2. Magnetic strips are useful for info that you do not want to alter

Question 18

What does MIDI stand for?

Answer 18

musical instrument digital interface

Question 19

What are MIDI instruments used for?

Answer 19

for composing and entering music into a computer system