Asmall amount of memory stored on the central processor for easy access is called

The answer is : Cache.  It is a small amount of memory stored on the central processor for easy access.  Cache is where active data are placed for easier access, it stores recently used information so that it can be quickly accessed at a later time. Some types of cache are browser cache, disk cache, memory cache, and processor cache.

it can either be 2. or 4. : ) tell me if i'm wrong or right

1. entrepreneur.com

2. wikipedia