Question

Consider the following types of memories.
(A) Hard Disk Drive (HDD)
(B) Cache Memory
(C) Random Access Memory (RAM)
(D) Registers
Arrange the above memories according to their access speed (from fastest to slowest):

• A. (D), (C), (B), (A)
• B. (A), (C), (B), (D)
• C. (B), (C), (A), (D)
• D. (D), (B), (C), (A)

Hint:

The fastest memory types are directly integrated into the processor, like registers and cache, while slower types like HDDs are used for large-scale storage.

Answer 1

The Correct Option is A

Step 1: Understanding the access speed of memories. 
- **Registers** (D) are the fastest form of memory because they are directly connected to the CPU and used to store small amounts of data that the processor needs immediately. 

- **Cache Memory** (B) is faster than RAM and stores frequently used data to speed up access time. 

- **Random Access Memory (RAM)** (C) is slower than cache memory but faster than hard disk drives, and it is used as the main memory for running programs and data. 

- **Hard Disk Drive (HDD)** (A) is the slowest memory type, as it is a mechanical storage device used to store large amounts of data permanently. 
 

Step 2: Conclusion. 
Thus, the correct order of memory access speeds from fastest to slowest is **(D), (C), (B), (A)**.