Hardware

Hardware

1. memory

   • Random access memory, this is lost once the computer is switched off and Read only memory is when the memory has been pre-saved/pre-recored
   • the need for a ROM is and cannot change data that it has saved by a program or user this happens when the computer is turned off.
   • the need for a ram is to store the operating system, applications, and the graphical interface if the computer loses power all data is lost.
   • Virtual memory is used in both hardware and software, it maps memory addresses into virual addresses in the storage
   • cache meory is the memory which is nearest to the CPU all the recent instructions are stored into the cache memory.
   • flash memory is an electronic non volatile computer storage medium that can be easily erased and reprogrammed

2. CPU

   • A central processing unit within a computer that carries out instructions of a computer program.
   • The CPU sends and fetches instructions to send to the ROM to