Unit 1.2/1.1 Memory

Unit 1.2/1.1 Memory

1. RAM (Random Access Memory) is volatile

   • ROM (Read Only Memory) is non-volatile
     • non-volatile means data is still stored when the computer is turned off
   • Volatile means all data is lost when the power is turned off
   • RAM is very expensive
     • More RAM can help improve the performance of your computer

2. Secondary storage is a hardware which stores data other than ROM/RAM

   • Virtual memory is an area of secondary storage
     • Virtual memory is Stored on the hard disk
     • Virtual memory is temporary storage

3. Data is first stored in RAM

   • Then It is stored In cache
     • Then it is stored in Virtual memory

4. Cache cannot hold much data

   • Cache It is very fast
     • Cache is located right next to the processor
   • As programs are executing, Cache holds commonly used instructions

5. A hard disk is a magnetic storage device

   • It's non-volatile
   • Stores and retrieves digital information

6. Firmware-Permanent software programmed into ROM

   • Disk thrashing-When a computers virtual memory subsistent is in a constant state of paging

7. Solid state memory is a type of computer storage

   • Stores data electronically
   • Such as USB's