Which of the following is not a secondary storage device of a computer system?

Correct option is D

DRAM (Dynamic Random Access Memory) is a type of primary memory, not secondary storage. It is used by the system to temporarily hold data that is actively being processed. It loses all stored information when the computer is turned off.

Important Key Points:

1. Secondary storage is non-volatile and used for long-term data storage.
2. DRAM is volatile, meaning it only holds data while the system is powered on.
3. Examples of secondary storage include hard disks, CDs, USB drives, and flash drives.

Knowledge Booster:

• Compact disks are optical secondary storage used to store data, music, and software.
• Pen drives and flash drives are USB-based portable storage devices and fall under secondary storage.
• DRAM, being fast and temporary, belongs to main memory, not permanent storage.