Input and Output Devices Quiz

Which of the following is used to store product information in markets?

• QR code

• Barcode

• Images

• None of the above

What does a QR code contain?

• A matrix of filled-in dark squares on a light background

• Series of dark and white parallel lines with varying thickness

• A matrix of filled-in dark circles on a light background

Complete this sentence: QR codes can store up to ……………….. digits.

• 10

• 30

• 7,000

• 10,000

Which of the following is used to store advertisements?

• QR codes

• Barcodes

• Images

• None of the above

What is the main function of an ergonomic keyboard?

• It supports a user’s wrists and hands

• It reduces the number of keys pressed

• It supports faster typing

Which of these is a pointing device?

• Ergonomic keyboard

• Tracker ball

• Scanner

Which of the following is NOT the main function of a pointing device?

• Drawing

• Moving files and folders

• Typing

Based on what principle do modern pointing devices work?

• Red light to detect motion

• Mechanical ball to find X and Y coordinates

• Voice input

Which of the following devices change sound signals to digital signals that can be stored on a computer?

• A microphone

• A sound card

• A digital-to-analogue converter

• A and B

Which of the following types of touchscreen is not suitable for gloved fingers?

• Capacitive

• Infrared

• Resistive