Information that needs to be instantly available to the CPU should be stored in the cache, which is the fastest type of memory accessible by the CPU.
If a user needs information to be instantly available to the CPU, it should be stored in the cache. The cache is a smaller, faster type of memory that stores copies of the data from the most frequently used main memory locations. This ensures the CPU has immediate access to these data without having to wait for slower types of memory, like RAM or a hard drive.
RAM (Random Access Memory) is fast, but not as fast as the cache. The hard drive is significantly slower and is used for long-term storage, while ROM (Read-Only Memory) contains the firmware which is not intended for temporary data storage or instant access by the CPU during regular operations.
So, for the most efficient access by the CPU, data should be stored in the cache. This has been a pivotal advancement in computer engineering, allowing for expedited processing and improved overall system performance.