IGCSE- M3- Input Devices Quiz

What are barcodes primarily used for?

• Identifying products in a supermarket

• Storing customer information

• Transmitting sound

• Creating digital images

What is a key advantage of using barcodes for management?

• Faster price changes on stock items

• Increases the number of staff needed

• Eliminates the need for scanners

• Easier to track customer preferences

How much information can QR codes hold compared to traditional barcodes?

• Less than barcodes

• The same amount as barcodes

• More than barcodes

• Only text data

What is a disadvantage of QR codes?

• They require expensive scanners

• They cannot hold images

• They can transmit malicious codes

• They are difficult to scan

What technology do digital cameras use to capture images?

• Laser beams

• Infrared sensors

• Photodiodes

• Magnetic fields

What is the main function of a keyboard?

• To capture images

• To transmit sound

• To input data

• To project images

What is a common application of microphones?

• Scanning documents

• Detecting sound

• Displaying images

• Controlling robots

What is an advantage of an optical mouse over a mechanical mouse?

• It has moving parts

• It can work on any surface

• It requires special software

• It is more expensive

What type of scanner is used to read passports at airports?

• Optical character recognition scanner

• Digital camera

• 2D scanner

• 3D scanner

What is a common use of touchscreens?

• At ordering stations for fast food

• For scanning barcodes

• To project images

• To input text only