What is the purpose of the 'write' operation in memory? MCQ with Answer and Explanation

Explanation:
DVDs use a shorter wavelength laser (650 nm vs 780 nm for CDs), which allows smaller pits and tighter tracks, resulting in higher storage capacity (4.7 GB vs 700 MB).

Explanation:
Secondary storage refers to non-volatile storage that is not directly accessible by the CPU, such as hard disks, SSDs, and optical discs. RAM and cache are primary storage; registers are internal to CPU.

Explanation:
CD-ROM (Compact Disc Read-Only Memory) uses laser beams to read microscopic pits and lands on the surface of the disc, classifying it as optical storage.