Which one of the following options lists all secondary storage devices?

Correct option is C

Secondary storage devices are used for long-term data storage. Examples include Hard Disk, Pendrive, and CD-ROM. They are non-volatile, meaning data is retained even when the computer is powered off.
Important Key Points:
1. Secondary Storage - These devices are used for permanent storage of data and are non-volatile.
2. Examples - Common secondary storage includes hard disks, USB drives, optical disks (e.g., CD/DVD).
Knowledge Booster:
· RAM, ROM: RAM is primary volatile storage used for temporary data, whereas ROM is non-volatile primary memory used to store firmware.
· Cache: Cache memory is a part of primary storage that temporarily stores data frequently accessed by the CPU.
· Hard Disk, Cache, RAM: The cache and RAM are primary memories, and thus cannot be considered secondary storage.