Chapter 2

Question 1

RFID (Radio Frequency Identification Recognition)

Answer 1

Uses radio waves to read and capture information stored in a tag

Question 2

Advantages and disadvantages of RFID

Answer 2

Advantages
-No line of sight needed
-Robust and reliable
-Fast read rate
-Bulk detection
-Bidirectional data transfer

Disadvantages
-Tag collision
-Can be jammed easily
-Easy to hack
-More expensive then barcode system

Question 3

Uses of RFID

Answer 3

-Live stock tracking
-Retail
-Admission passes
-Libraries

Question 4

OCR(Optical character recognition)

Answer 4

Test on hard copies to electronic form

Question 5

OCR (Optical character recognition) uses

Answer 5

-Processing identity cards
-Hard copy documents to electronic
-ANPR(Automatic number plate recognition)
-Digitalizing old documents

Question 6

Barcode uses

Answer 6

-Supermarkets
-Libraries
-Safety in companies (electrical equipment)

Question 7

Advantages and disadvantages of laser printers

Answer 7

Advantages
-Fast if printing multiple complies
-Handles large print jobs
-High quality
-Toner cartridges last long

Disadvantages
-Expensive to run
-Produce ozone

Question 8

Advantages and disadvantages of inkjet printers

Answer 8

Advantages
-Good quality
-Cheaper to buy
-Light weight
-Doesn’t produce ozone

Disadvantages
-Slow
-Expensive if used a lot
-Printing can be smudged
-Can’t do large print jobs

Question 9

Advantages and disadvantages of dot-matrix printers

Answer 9

Advantages
-Very cheap to run and maintain
-Easy to use

Disadvantages
-Loud
-High initial price
-Slow
-Poor quality

Question 10

Speakers

Answer 10

DAC(Digital to analogue converter)
Passed through amplifier
Electric current converted to sound