Suggest and justify output devices for a given situation
Printer, speaker, monitor, actuator, LED/light.
2 of 14
Give examples of optical storage
DVD, CD, Blu Ray
3 of 14
Give examples of magnetic storage
Hard disk drive, Magnetic tape
4 of 14
Give examples of solid state storage
USB memory stick, SD card, solid state drive (flash technology)
5 of 14
Suggest and justify optical and magnetic devices for a given situation
Magnetic storage uses a magnetisable material, patterns of magnetisation are used to represent binary sequences. Optical storage is a laser that reads the disk by looking at its reflection, determining whether there are pits on the surface.
6 of 14
Suggest and justify flash devices for a given situation
Flash storage uses a special type of RAM that is non-volatile.
7 of 14
Define the term volatile
Volatile memory is where data is lost when the computer is switched off.
8 of 14
Describe the difference between RAM & ROM
RAM is volatile, memory can be read and written to whereas ROM is permanent memory that cannot be altered (non-volatile) but can be read from.
9 of 14
State what is stored on ROM and why ROM is suitable
It stores the bootstrap because it should never be altered or the instructions will be lost. It must be permanent as it is the first instruction the computer will read when turned on, without it the system will not start up.
10 of 14
State what is stored on RAM and why RAM is suitable
It stores the application programs, files and parts of the operating system that are currently being used by the system as the user will want to use different programs so the memory used needs to be alterable.
11 of 14
Understand the difference between DRAM & SRAM
SRAM is static whereas DRAM is dynamic. DRAM needs to be regularly refreshed in order to keep storing the data. SRAM will need to store the data as long as there is power being fed to the memory.
12 of 14
Understand the difference between DRAM & SRAM pt2
SRAM is faster, it consumes less power, it uses more transistors, it is more expensive than DRAM. DRAM is used in main memory whereas SRAM is used in cache memory.
13 of 14
Describe how virtual storage works
Virtual Storage is the separation of logical storage from the actual physical storage structure.
14 of 14
Other cards in this set
Card 2
Front
Suggest and justify output devices for a given situation
Comments
No comments have yet been made