What is a CPU and what does it do?
We get asked a lot of questions regarding computers and always answer them for free at Just Geek IT . One of the most asked question is, “what is a cpu? Well to be honest, it is the brain of the computer much like we have a brain. The CPU has four primary functions: fetch, decode, execute, and writeback. We just opened more questions about the CPU I bet.
Fetch sounds exactly what it means. The CPU retrieves information from the computer’s memory.
Decode – When the CPU retrieves the data it comes in bits. The CPU decodes the bits and translates it to information.
Execute – When the CPU translates the data into information it then tells the computer to execute the information. Opening a program is an executable command that comes from the CPU.
Write back – The CPU takes this output and writes it into the computer’s memory.
If you have any further computer questions, please feel to let us know.