Cache Memory

Cache memory is a small, high-speed memory that is located closer to the CPU (Central Processing Unit) than the main memory. It is used to store frequently accessed data and instructions to improve the overall performance of the computer system. The cache memory acts as a buffer between the CPU and the main memory, providing faster access to data and instructions.

Statement Explanation

The given statement states that cache memory is a very high-speed memory to increase the speed of the processor. This statement is true, and here's why:

Memory Unit Communicating with CPU
Cache memory is a memory unit that communicates directly with the CPU. It is designed to provide fast access to frequently used data and instructions. The cache memory is organized into multiple levels, with the level closest to the CPU being the L1 cache. The cache memory is built with high-speed static random-access memory (SRAM) cells, which can be accessed much faster than the main memory.

Backup Storage
Cache memory is not used for backup storage. Its primary purpose is to store frequently accessed data and instructions to reduce the time taken to fetch them from the main memory. The cache memory only holds a subset of the data and instructions present in the main memory.

High-Speed Memory
The cache memory is indeed a very high-speed memory. It is designed to provide faster access to data and instructions than the main memory. The cache memory operates at a speed closer to that of the CPU, reducing the time taken to fetch data and instructions. This high-speed access improves the overall performance of the processor.

Secondary Storage
Cache memory is not considered as secondary storage. Secondary storage refers to devices like hard drives, solid-state drives, or optical drives that provide long-term storage for data and programs. Cache memory is a temporary storage that holds frequently accessed data and instructions for faster access by the CPU. It is much faster than secondary storage devices.

Therefore, option 'C', which states that cache memory is a very high-speed memory to increase the speed of the processor, is the correct statement.