Which statement is correct concerning computer memory and data storage fundamentals?

Question

Which statement is correct concerning computer memory and data storage fundamentals?

1. A. RAM is non-volatile memory and retains data without power
2. B. ROM allows both read and write operations during normal computer functioning.
3. C. Cache memory is faster than the Main memory and stores frequently accessed data. (Correct answer)
4. D. CPU directly accesses secondary storage devices without involving the main memory.

Correct Answer

Option C — C

Detailed Solution & Explanation

The correct answer is Option C.

Key Points

• cache memory is faster than the main memory and stores frequently accessed data.
• Cache is a small, very fast memory that sits between the CPU and main memory (RAM), holding recently and frequently used data so the CPU avoids slower RAM access.
• That statement is correct.

Additional Information

• (A) RAM is volatile — it loses its contents when power is removed. Non-volatile memory is ROM/flash.
• (B) ROM is read-only in normal operation; it does not allow ordinary write operations.
• (D) The CPU accesses main memory, not secondary storage (SSD/HDD) directly; data must be loaded from secondary storage into RAM first.

Exam Tip

• memorise the speed/size hierarchy — Registers > Cache (L1>L2>L3) > RAM > SSD > HDD — faster and costlier at the top, larger and cheaper at the bottom.