Which of the following is a primary memory device?
2026
Which of the following is a primary memory device?
Answer: C. RAM — ConceptA computer memory hierarchy separates primary memory, which the processor uses while work is in progress, from secondary storage, which keeps data for…
- A.
Hard Disk
- B.
CD-ROM
- C.
RAM
- D.
Pen Drive
Attempted by 308 students.
Show answer & explanation
Correct answer: C
Concept
A computer memory hierarchy separates primary memory, which the processor uses while work is in progress, from secondary storage, which keeps data for long-term use.
Primary memory is fast and directly available to the processor; its working-memory component is typically volatile. Secondary storage is non-volatile and is accessed through storage input/output.
Application
RAM temporarily holds the instructions and data that the processor is currently using. Its role in active execution places it in primary memory.
Contrast
Hard Disk: non-volatile magnetic secondary storage for files and programs.
CD-ROM: read-only optical secondary storage used to distribute persistent data.
RAM: volatile semiconductor working memory used during program execution.
Pen Drive: removable non-volatile flash storage connected through USB.
Cross-check
If power is removed, the active contents of ordinary RAM are lost, whereas the other listed devices retain stored data. This confirms the primary-memory classification of RAM.
Therefore, the primary memory device is RAM.