Studied by 7 peopledefine system software
software that manages the comp, usually supplied with the comp
define operating system
specialised software that communicates with the computer harware to allow other programs to run
function of OS
provides a platform on which users can run programs
mention 5 purposes of the operating system-DUMP-FUM
device drivers, user management, multitasking, peripheral management, file management, user interface, memory management
what does the user interface do
allows a user to interact with a computer
what are the features of a user interface
grafical user interface, command line, menu, natural language
mention 3 feautures of GUI
WIMP-windows, icons, menus, pointers optimised fro mouse and touch gesture input visual interactive
3 features of a command line
text based
less resource heavy compared to GUI
more commands than GUI
3 feature of menu
successive menus presented to user
single options chosen at each stage
often with buttons and keypads
3 features of natural language
responds to questions in spoken langauge
not always reliable
getting better siri, alexa, cortana..
define memory management
the process of the operating system deciding what should be in memory at any given time
what happends when the memory is full
the operating syetem uses virtual memory
define multitasking
running multiple applications at the same time by giving each application a small time-slice of processor time
what is peripheral management
this is the management of connected input and output devices such as mouse, keyboards, webcams...
explain what device driver do
they transelate operating system commands into hardware specific commands that the hardware will understand(many device drivers are already built in)
what does user management do
it allows for different people to log into the smae comp w/ a username and password and remembers personal settings, each user may have different file access settings
what is file management
includes access permission for files, opening files, moving , deleting and renaming files and allocating files to folders
what is utility software
computers come with this and it performs housekeeping tasks
what is encrytption software
this turns plain text into unreadable ciphertext using a key, prevents data from being read by hackers
what is defragmentation software
this puts fragments and free space together, improves speed by reducing red-write movement across the surface of the disk
what application does not benefit from defragmentation
solid state drive becuase it has no moving parts so this would reduce lifespan
what is data compression
this reduces a file size which makes it faster to download
Note
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