Modern CPU's utilize internal registers as high-speed memory. Below the register level in the typical memory hierarchy is ________ memory.

The role they play is to store the most recently used memory words. When a program needs to read a memory word it looks here first. If it finds what it needs it is called a hit. This improves _________ since it is much faster than going to main memory.

Typical _________ times for these are 2 nsec or less.

The _________ determines when and where to place a new item in memory.

Select your answers from the following list only:

RAM OS disk flash cache one two multi-core hit seek performance trap access development efficiency operation