1.2 Memory

1.2 Memory

1. ROM

   • Read only memory
     • Memory that cannot be changed by a program or user
       • Stores instructions for the computer start up
         • Non-volatile retains memory even when the computer is turned off

2. RAM

   • Random access memory
     • E.g- Operating system, apps, graphical user interface
   • A fast temporary type of memory which programs apps and data are stored
     • Volatile, all data is lost if computer is turned off

3. Solid State

   • Doesn't move
   • A drive that uses non volatile memory as a means of storing and accessing data

4. POST

   • Power On Self test
   • Checks the components like peripheral devices are present and functioning correctly
   • BIOS
     • Basic Input,Output System
     • The chip performs checks
   • It will show an error message if the check fails

5. Virtual Memory

   • Simulated memory on the hard drive
   • Holds apps on the CPU that RAM couldn't support
   • Lots more memory to be used than there is in the system