computer science

computer science

1. Primary Memory

   • RAM
     • stands for random access memory
     • the place where you store data when a program is being executed
   • ROM
     • stands for read only memory
     • it is a flash memory chip which contains a small amount of non-volatile memory
     • non-volatile means that its contents cannot be changed it retains its memory even after the computer is switched off
   • Cache memory
     • it is a small amount of memory
     • part of the CPU
     • stores memory the CPU is likely to reuse

2. secondary storage

   • magnetic
   • optical
     • useful lightweight media for transporting data and programs
     • data is written onto a disc by a laser and is read from the disc by another laser
   • flash memory
   • Secondary storage is used for storing documents like photos and videos or anything that will be kept for long. The information also needs to be loaded to RAM before it can be used. It is used to backup primary storage