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1.2 memory and storage - Coggle Diagram
1.2 memory and storage
1.2.1 Primary Memory
key features
most are volatile
more expensive than 2ndary and smaller
capacity is smaller in capacity
closer to the cpu and is faster
memory is where binary data is stored
examples
cache
located in the cpu
very small (few mb)
very fast
only function well if programs written well
ram
needed to store programs that are in use
enables multi tasking(running multiple programs)by copying the data needed into the cpu
stores all insttrcutions that the cpu needs
volitile
stores data in smalll charges in transistors and is refreshed every few miliseconsds
static ram
4-5 transistors wired together for each bit but does not lose charge more expencice
still needs consant power
refresed less so faster
dynamic ram
needs rereshing so limeted on data reading speeds
needs constant power
more ram better storage as can storae more programs less from hard
rom
read only memory
memorayr that can only be read and never writen over
where boot up scripts are located
1.2.2 Secondary Storage
1.2.4 Data storage
1.2.3 Units
1.2.5 Compression
