IGCSE Input Output Devices Lesson 2

What are the two common types of barcode systems?

• A. Universal Product Code version 'A' (UPC-A) and Code 128
• B. QR Code and Code 39
• C. EAN-13 and ITF-14
• D. Code 93 and Codabar

What can UPC-A barcodes represent?

• A. Only numeric digits
• B. Both letters and numbers
• C. Only letters
• D. Special characters

Why are barcodes used in retail?

• A. Faster scanning of products than entering prices
• B. To provide product information
• C. As a form of advertising
• D. To track product expiration dates

What information can QR codes contain?

• A. Only website links
• B. Only numerical data
• C. Links to websites and other information
• D. Only product prices

How do QR code scanners work?

• A. They use sound waves to read the code
• B. They use cameras to process the layout of pixels
• C. They use magnetic fields to decode information
• D. They use barcode lines to store data

What is the primary use of a digital camera in terms of input devices?

• A. To scan documents
• B. To capture images as digital data
• C. To record audio
• D. To serve as a webcam

How do digital cameras store information?

• A. On film
• B. In a cloud server
• C. On memory cards or internal memory
• D. On magnetic tapes

Which of the following is an advantage of QR codes over traditional barcodes?

• A. They can store more data
• B. They are smaller in size
• C. They require special scanners
• D. They can only be scanned from up close

What type of light do barcode scanners typically use?

• A. Ultraviolet light
• B. Infrared light
• C. Red light
• D. Blue light

Which format does a digital camera typically use to save images?

• A. MP3
• B. DOCX
• C. JPEG
• D. TXT