memory

memory

1. ROM

   • What does it mean?
     • Read Only Memory
     • Memory that can't be changed by a program or user, it retains its memory after the computer is turned off.
   • what is its purpose?
     • Stores the instructions which are needed to ‘boot up’ the computer.

2. RAM

   • what does it mean?
     • Random Access Memory
     • a fast temporary memory which programs, apps and data are stored.
   • what is its purpose?
     • Stores the instructions and data that are needed while programs are being used

3. VIRTUAL MEMORY

   • what is its purpose?
     • it provides virtual address mapping between applications and hardware memory
   • what does it mean?
     • memory that looks like main storage although most of it is supported by data held in secondary storage