alleryStart learning →What does an optical drive use to read a disc?
AA magnet
BA laser
CA fan
DA needle
Answer & Solution
Correct answer: B. A laser
A laser diode lights up the disc surface and the reflection is read.
Keep practising Computer fundamentals and storage devices
Browse all Computer fundamentals and storage devices questions for Olympiad (Class 5), or explore more Computer Science topics.
Related questions
A chip with millions of tiny cells that keeps data electronically is what kind of memory?Compared with main memory, registers inside the CPU are what?Modern CPUs are built on a single chip. What is such a CPU called?What does the CPU's program counter keep track of?Each memory cell has a number used to find it. What is that number called?What is the defining feature that sets modern computers apart from other machines?Which of these is software, not hardware?Physical parts you can touch are called hardware. What are the instructions called?