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Functions of an Operating System
Descripción
GCSE (Computer Systems - Software) Computer Science Mapa Mental sobre Functions of an Operating System, creado por Leann McLeod el 07/04/2016.
Sin etiquetas
computer science
computer systems - software
gcse
Mapa Mental por
Leann McLeod
, actualizado hace más de 1 año
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Menos
Creado por
Leann McLeod
hace más de 8 años
9
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0
Resumen del Recurso
Functions of an Operating System
Manages resources and providing user interface
Manages Peripherals e.g. input and output devices
Manages printing using spooling
Data is stored on hard disc/in memory/stored in a queue
Document is printed when printer is free/in correct order
Manages backing storage
Ensures data is stored and can be retrieved correctly from any disk drive
Creates and maintains filing systems
FAT
File Allocation Table
NFTS
Organises files in a hierarchical directory structure
File Compression
The amount of data is reduced and the file is mad smaller
Definiton
The process of making a file size smaller
Used to save disk space
Disk defragmentation
Fragmented files are split up and stored on different parts of the disk
Will slow down access speed
Definition
the process of files parts being physically rearranged (into the order required for access)
Reorganising
moving
re-ordering
Manages Memory (RAM)
Ensures that ...
programs/data do not corrupt eachother
all programs and data including itself is stored in a proper memory location
Manages processes
Ensures that...
different processes can utilise the CPU without interfering and crashing with one another
all tasks appear to run simultaneously
Manages Security
Allows users to..
Create and delete user accounts
Logon
Change passwords
Providing a user interface
provides a CLI
Allows users to have more than one window open
provides a GUI
provides users with error/help messages
allows customisation of interface
allows user to switch between tasks
allows access to system setting as hardware
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