CompTIA A+ (220-901) — Question 21

Which of the following devices uses both light and a lens to facilitate data warehousing?

Answer options

• A. Digitizer
• B. Touch screen
• C. Barcode reader
• D. Camera

Correct answer: C

Explanation

The correct answer is C, as a barcode reader utilizes light to scan barcodes and a lens to focus on the barcode image for interpretation. Options A and B do not inherently involve data warehousing processes, while D, although it uses light and a lens, is primarily for capturing images rather than specifically for data warehousing.