5064468
Description
Mind Map by Leann McLeod, updated more than 1 year ago
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Created by Leann McLeod
over 8 years ago
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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
- Data is stored on hard disc/in
memory/stored in a queue
- 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
- File Allocation
Table
- NFTS
- FAT
- Organises files in a hierarchical
directory structure
- Ensures data is stored and can be retrieved
correctly from any disk drive
- File
Compression
- The amount of data
is reduced and the
file is mad smaller
- Definiton
- The process of making a file size smaller
- The process of making a file size smaller
- Used to save
disk space
- The amount of data
is reduced and the
file is mad smaller
- 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
- Reorganising
- the process of files parts being physically rearranged (into the order required for
access)
- Fragmented files are split up
and stored on different parts
of the disk
- Manages Memory (RAM)
- Ensures that
...
- programs/data do not corrupt
eachother
- all programs and
data including itself
is stored in a proper
memory location
- programs/data do not corrupt
eachother
- Ensures that
...
- Manages processes
- Ensures
that...
- different processes can utilise
the CPU without interfering and
crashing with one another
- all tasks appear to run simultaneously
- different processes can utilise
the CPU without interfering and
crashing with one another
- Ensures
that...
- Manages Security
- Allows users to..
- Create and delete user accounts
- Logon
- Change
passwords
- Create and delete user accounts
- Allows users to..
- 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
- provides a
CLI
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