Module 1.2 (Input/Output)

Question 1

What is input?

Answer 1

Data that must still be processed

Question 2

Give 3 types of input devices

Answer 2

1. Scanner
2. ATM
3. Touch screen

Question 3

What does DSLR stand for

Answer 3

Digital single lens Reflex

Question 4

Give advantages of digital cameras

Answer 4

• Can take thousands of photos
• Can see the image immediately
• Easy to edit images

Question 5

Give 2 disadvantages of digital cameras

Answer 5

• Some can be very expensive
• It is easy to damage them

Question 6

What are the most important specifications for buying a camera?

Answer 6

1. Optical zoom
2. Resolution
3. Storage space

Question 7

What does a large lens do?

Answer 7

Allows more light to be captured which improves the image quality

Question 8

What does a large sensor do?

Answer 8

Capture more light and allow better quality in different lighting

Question 9

What does optical zoom mean

Answer 9

Uses lens on camera to get closer to the object being photographed

Question 10

What does digital zoom mean?

Answer 10

Uses the magnifying glass in the software system

Question 11

Define Resolution

Answer 11

The number of pixels that make up a picture

Question 12

What is ISO rating

Answer 12

How sensitive the camera sensor is to light

Question 13

What is a flatbed scanner

Answer 13

• Slightly larger than A4 size
• Can scan

Question 14

What is a Sheetfed scanner

Answer 14

• portable scanner
• smaller than flatbed

Question 15

What is colour depth

Answer 15

Number of different colours that can be represented by a pixel

Question 16

What is the quality of a scanned image determined by?

Answer 16

The resolution and the colour depth

Question 17

Give some advantages of scanners

Answer 17

• Sort large documents into one file
• Scanned copies can be emailed instead of faxed
• Barcode scanners speed up processes

Question 18

Give some disadvantages of scanners

Answer 18

• Can be slow
• Quality depends on the original

Question 19

What is biometric input

Answer 19

Measuring unique biological features of a person (involves scanners) eg. Fingerprints

Question 20

What is a facial recognition system

Answer 20

A technology capable of identifying or verifying a person from a digital image

Question 21

Give advantages of biometric input

Answer 21

• Security
• Tied to one person

Question 22

Give disadvantages of biometric input

Answer 22

• Expensive to implement
• Needs additional software

Question 23

What does ATM stand for

Answer 23

Automatic Teller Machine

Question 24

What do ATMs receive their input through?

Answer 24

• Card read slot
• Touch Screen

Question 25

Give advantages of ATMs

Answer 25

• Allows transactions 24/7
• Able to withdraw from any bank

Question 26

What does RFID stand for?

Answer 26

Radio Frequency Identification

Question 27

What is RFID used for?

Answer 27

Automatically recognize a product or item

Question 28

How does RFID work?

Answer 28

1. RFID tag
   Electromagnetic field
2. RFID antenna
3. Application

Question 29

How does a POS system work?

Answer 29

Scanners record stock of what is brought into the shop. The data is stored in a database and a price is allocated. At the till the cashier uses a scanner to record the item you are buying.

Question 30

What are touch screens a combination of?

Answer 30

A LCD and thin touch sensitive film

Question 31

Give advantages of touch screens

Answer 31

• Allow more screen space
• Allows drawing

Question 32

Give disadvantages of touch screens

Answer 32

• Not as fast as typing on a physical keyboard
• Gets dirty easily