Identify the correct square of the following computer storage components A-D in the descending order of their access speed (from faster to slowest)
A. Cache memory
B. Main memory
C. Magnetic disk
D. CPU Registers
Choose the correct answer from the options given below:

Correct option is D

The correct order of computer storage components in descending order of their access speed is:
CPU Registers (D): These are the fastest storage components within a computer system. Registers are small storage locations directly within the CPU used to store temporary data and instructions. Since they are closest to the CPU, they have the highest access speed.
Cache Memory (A): Cache memory is slightly slower than CPU registers but faster than the main memory (RAM). It stores frequently accessed data and instructions to speed up processes and improve overall CPU performance. It acts as a buffer between the CPU and the main memory.
Main Memory (B): Main memory, also known as Random Access Memory (RAM), is slower than cache memory but faster than magnetic disks. It temporarily stores data and instructions currently being used by the CPU.
Magnetic Disk (C): Magnetic disks, such as Hard Disk Drives (HDDs), have the slowest access speed among these components. They are used for long-term storage of data and programs. The access time is slower because it involves mechanical movement to read/write data.