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computer science revision
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- 1how do you sample sound?measure the amplitude at specific intervals and store amplitude as binary
- 2whats the positives and negatives to increasing sound quality?its a much more quality audio but takes up more space
- 3RAMrandom access memory-primary storage or main memory
used to store programs and data that is currently in use
fast but volatile (needs power to keep its data) - 4ROMread only memory
cant be changed only read
used to store computers initial start up code - 5flash memoryNAND memory
non volatile
can be re written and edited - 6cache memorysmall but extremely fast memory on CPU faster than RAM
used to store frequently used instructions to speed up execution - 7secondary storagemuch slower than main memory but is large
used for long term storage of programs - 8magnetic hard diskstores data on spinning disk
large
cheap per MB
fragile
suitable for main storage on a non portable device - 9magnetic tapestores data on a long strip of magnetic material
very large
very cheap per MB
data can only be read(no random access)
suitable for backups - 10solid state drive (SSD)stores data on flash memory chips
fast
durable
portable
currently more expensive than magnetic drives - 11optical disksstores data on spinning reflective disk
- 12and (.)a b a.b
1 1 1
1 0 0
0 1 0
0 0 0
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- Fichas sobre computer science revision, creado por jack marshall el 17/04/2019.
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- jack marshall
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