Input Devices Quiz

What is the main advantage of using digital cameras as input devices?

• Require less maintenance

• Use less electricity

• Produce higher quality images

• Are cheaper to purchase

What is the purpose of a charge coupled device in a digital camera?

• Converts light into electricity

• Transfers images wirelessly

• Captures images on film

• Controls the camera's embedded system

What is the function of an analog to digital converter in a digital camera?

• Captures 3D imagery

• Measures the distance between the eyes

• Converts analog images to digital representation

• Adjusts the shutter speed

What is the main use of 2D scanners?

• Recognize faces

• Read barcodes

• Input hard copy paper documents

• Capture 3D objects

What technology is used by 2D scanners to read passports and capture biometric data?

• Analog to digital conversion

• Radio frequencies

• Optical character recognition

• Gamma imaging

How do 3D scanners capture 3D objects?

• By using x-rays and radio frequencies

• By using a charge coupled device

• By converting solid objects into digital images

• By measuring the distance between the eyes

What is the main advantage of using barcodes in supermarkets?

• Automatic stock control

• Faster checkout queues

• Easier and faster price changes

• Better track of sell by dates

What is the main advantage of QR codes over standard barcodes?

• Hold much more data

• Cannot be transmitted via email

• Require expensive lasers to read

• Hold less data

What is the purpose of the framed QR code?

• To encrypt the QR code

• To add advertising in the middle

• To make it difficult to read

• To reduce the response time

How does a QR code work when scanned with a QR code reader?

• The browser software decodes the data

• The QR code is printed out

• The camera automatically takes a picture

• The data is sent to the manufacturer