FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -In hierarchical memory systems, processor (CPU) registers are at the top of a pyramid-like structure (level 0) while optical disks and tape backup devices are at the bottom (level 4).

Detailed explanation-2: -Memory hierarchy is arranging different kinds of storage present on a computing device based on speed of access. At the very top, the highest performing storage is CPU registers which are the fastest to read and write to.

Detailed explanation-3: -The computer memory can be divided into 5 major hierarchies that are based on use as well as speed. A processor can easily move from any one level to some other on the basis of its requirements. These five hierarchies in a system’s memory are register, cache memory, main memory, magnetic disc, and magnetic tape.

Detailed explanation-4: -Modern processors use either static or dynamic RAM as main memory, with the latter usually accessed via one or more cache levels. Processor registers are normally at the top of the memory hierarchy, and provide the fastest way to access data.

Detailed explanation-5: -A processor register (CPU register) is one of a small set of data holding places that are part of the computer processor. A register may hold an instruction, a storage address, or any kind of data (such as a bit sequence or individual characters). Some instructions specify registers as part of the instruction.