Multiple choice

Which of the following options uses a laser beam to read/write data?

  1. Winchester disk

  2. CD ROM

  3. Floppy disk

  4. Magnetic tape

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CD ROM (Compact Disc Read-Only Memory) uses laser beam technology to read data from optical discs. The laser reflects differently from pits and lands on the disc surface. Winchester disks and floppy disks use magnetic read/write heads, while magnetic tape uses magnetic recording - none use lasers.