1.2.1 primary storage

Question 1

what is RAM

Answer 1

it can directly access any memory location in random order AND IS VOLITILE

Question 2

what is volatile

Answer 2

when storage looses its data when powered off

Question 3

what is non-volatile

Answer 3

when the power is switched off the data stored isn’t lost

Question 4

what is ROM

Answer 4

non-volitile factory made chip which is built into the motherboard

Question 5

what is the purpose of RAM

Answer 5

Stores the data which is currently being used. Stores the parts of the program that are running to be used by the CPU.

Question 6

WHAT IS THE PURPOSE OF ROM

Answer 6

ROM provides the necessary instructions for communication between various hardware components. Stores the BIOS.

Question 7

what is primary storage

Answer 7

refers to the memory areas that the CPU can access very quickly. Primary storage is mostly volatile (except for ROM.)

Question 8

what is secondary storage

Answer 8

is non-volatile, it’s where all data is stored when not in use. Secondary storage is much slower than primary.

Question 9

examples of primary storage

Answer 9

Registers
Cache
RAM
ROM

Question 10

what are secondary storage examples

Answer 10

Hard disks
USB
SD cards

Question 11

what is virtual memory

Answer 11

Extra ram space that is saved on the hardrive

Question 12

advantages of virtual memory

Answer 12

allows more programs to be opened even when there’s no space left in RAM

Question 13

disadvantages of virtual memory

Answer 13

Takes time to write the code to the virtual memory
Takes time to write the code to the virtual memory
Cause disk thrashing
VM is slower to access than RAM direct (because it has to go back to RAM first)