Computing Revision by Jack Anderson

Characteristics of a CPU and their functions

jakinfenwa — 2014-11-06 09:08:02 UTC

Some things that can affect the CPU's performance are clock speed, cache size and number of cores. The clock speed is how many instructions can be executed by the CPU in one second. A faster clock speed means that more instructions can be executed per second and it is faster making the performance faster. The CPU can get information from the cache faster than getting it from the RAM or the hard disk.

Function of a CPU

jakinfenwa — 2014-11-06 09:08:30 UTC

The first step the CPU does to fetch and execute instructions is to fetch some data and instructions from the main memory then store them in it's own internal memory register. It then makes sense of the instruction by decoding it. It then processes the data and stores it in another register. It then goes to fetch some more instructions and data and it carries on in this cycle.

CPU

jakinfenwa — 2014-11-06 09:08:55 UTC

The purpose of the CPU is to carry out the computer's function and instructions - it processes the data.

The need for reliability in computer systems

jakinfenwa — 2014-11-06 09:09:15 UTC

Computers are relied on, on a day to day basis in the modern world. we rely on computers to look after our money, our health and our general everyday life. If computers failed, people on life support would die. money in online banks would dissapear into thin airairplanes and boats would lose course and crash . werely on computers more than we know.

The need for relia

jakinfenwa — 2014-11-06 09:09:41 UTC

Importance of computers in the modern world

jakinfenwa — 2014-11-06 09:09:41 UTC

Computer systems are very important in the modern world because they allow us to do tasks which would be too repetitive/monotonous or tedious for humans to perform.

Computer systems

jakinfenwa — 2014-11-06 09:11:13 UTC

Computer system

jakinfenwa — 2014-11-06 09:11:14 UTC

A computer system is a collection of hardware and software capable of taking a data input, processing that input and then outputting it.

Computer

jakinfenwa — 2014-11-06 09:11:21 UTC