Which one of the following has the shortest access time (fastest memory)?

In the computer memory hierarchy, Registers have the shortest access time, making them the fastest memory component. Registers are small, high-speed storage locations directly within the CPU that hold data currently being processed. Their proximity and direct connection to the CPU allow for immediate data retrieval and manipulation.

• Cache memory is faster than RAM but slower than registers, acting as a buffer between the CPU and main memory.
• RAM (Random Access Memory) is the main memory, significantly slower than cache and registers.
• Hard Disk is the slowest memory type listed, serving as long-term, non-volatile storage.