1.1.3 Input Output devices Flashcards
Give 2 examples of optical storage devices?
CD-ROM devices
DVD devices
Give 2 examples of magnetic storage?
magnetic tape
hard-disk drives
Give 2 examples of flash storage?
Solid State Drives (SSDs)
USB Flash Drives
How do optical drives store data?
As grooves and pits
How do optical drives work?
By shining a laser at the media and processing the reflection of the media
Name 2 advantages of optical storage devices?
Cheap per GB
Portable
Name 2 disadvantages of optical storage devices?
Slow to access times
Prone to scratches
How do magnetic drives store data ?
store information magnetically represent binary information using two magnetic states: polarised and unpolarised.
How do magnetic drives work?
By having a magnetic drive head physically move over the surface of the disk .
Name 2 advantages of magnetic drives devices?
Cheap per GB
Large capacity
Name 2 disadvantages of magnetic drives devices?
Slow access times
Fragile
How do flash drives store data ?
In memory chips
Name 2 advantages of flash drive ?
Durable
Fast access times
Name 2 disadvantages of flash drives ?
Cost per GB
Limited read/writes
What does ROM stand for?
Read Only Memory
Name 3 features of ROM?
A small piece of ROM is located on the motherboard
Non volatile
Contains the bootstrap (first instructions for computer)
What does RAM stand for?
Random Access Memory
Name 3 features of RAM?
Holds information being being executed by the processor
Volatile
Faster than the hard disk
What does POST stand for?
Power On Self Test
Where is POST stored?
ROM
What are the 2 steps does POST do?
POST sends signals to all the connected components, wakes them up and makes the CPU aware of their existence
The operating system is loaded from the hard drive to RAM
What is virtual storage?
Virtual Storage is the concept of storing and receiving data over the internet in the cloud instead of a local storage device
Name 3 advantages of virtual storage?
Data can be accessed at any time from any device as long as there is an internet connection
Data can easily be shared without the need for removable media
It is easy to collabarate
Name 3 advantages of virtual storage?
Data can be accessed at any time from any device as long as there is an internet connection
Data can easily be shared without the need for removable media
It is easy to collaborate
Name 3 disadvantages of virtual storage?
Expensive
No internet connection means no access to files
Lack of control over the data
