Flashcards
computer science
Flashcards do conjunto (32)
- 1What is a Computer Systema computer system is a device that inputs data, processes it and outputs it.
- 2what is the cpuit is the brain of the computer
- 3control unitcontrols the flow of data
- 4Arithematic lodgic unitcarries out the calculations and logical decisions
- 5cachestores frequently used instructions which are faster to access
- 6registerHigh speed memory in the CPU
- 7what is the FDE cycleFetch , Decode and Execute
- 8How can clock speed helpit increases the number of cycles
- 9cores can help by ?help by more cycles are able to be completed
- 10data typesstring, integer, float/real
- 11castingconverting one data type to another
- 12Secondary Storage● Non volatile
● Used to store files and programs - 13● Capacityhow much space there is
- 14speedhow quick it loads
- 15portabilityeasy to carry/take with you from A to B
- 16durabilityhow easy it is to damage
- 17reliabilityhow long does it last
- 18pricehow expensive it is
- 19A student is looking for a device to store their homework. They want to be able to transfer their homework files easily between School and home.needs to be reliable, portable and the cost of it
- 20optical storagea laser light used to retrieve data from the disk
- 21examples of optical storageCD, DVDs and blue rays
- 22advantages of optical storagecheap to purchase
light weight
portable but bulky
reliable if looked after properly - 23disadvantages of optical storagevery slow
easily scratched - 24devices that use magnetic technologyHard disk drive
Floppy disk
Magnetic tape - 25characteristics of Magnetic technologyRelatively Cheap per GB.
Large capacity.
Very reliable.
Not durable: Prone to damage
if dropped.
Slow to read/write data. But
faster than optical. - 26Floppy DiskRelatively Cheap per GB.
Portable.
Slow to read/write
Very Small capacity
Not durable: Prone to damage
if dropped. - 27magnetic tapeRelatively Cheap per GB. Large capacity. Very reliable. Durable as it’s not designed to be moved.
Slow to read/write as it’s used
to back up large amounts of
data. Not portable - 28solid state technologySolid State Drive (Internal vs External)
USB Stick / Memory Stick
SD card - 29advantages of solid stateDurable due to no moving parts
Fast read & write times than a
HDD
Portable due to it’s small
physical size
Compact so can fit into smaller
devices
Low power consumption - 30disadvantages of solid stateRelatively expensive per GB
Limited life span, can only be
written to a certain number of
times - 31SD card advantages and disadvantagesDurable due to no moving parts
Fast read & write times
Portable as it’s lightweight and
has a small physical size
Cheap
Lower capacity than
alternatives
It’s small physical size can
mean it’s easy to lose
Limited life span - 32USB stick advantages and disadvantagesDurable due to no moving parts
Fast read & write times
Portable as it’s lightweight and
has a small physical size
Cheap
Lower capacity than
alternatives
It’s small physical size can
mean it’s easy to
Limited life span
Informações
- Descrição
- Year 9 Computer Science FlashCards sobre computer science, criado por Lewis Hart em 29-09-2022.
- Criado por
- Lewis Hart
- Visualizações
- 1
- Avaliação