Functions of an Operating System

Description

GCSE Computer Science (Computer Systems - Software) Mind Map on Functions of an Operating System, created by Leann McLeod on 07/04/2016.
Leann McLeod
Mind Map by Leann McLeod, updated more than 1 year ago
Leann McLeod
Created by Leann McLeod over 8 years ago
9
0

Resource summary

Functions of an Operating System
  1. Manages resources and providing user interface
    1. Manages Peripherals e.g. input and output devices
      1. Manages printing using spooling
        1. Data is stored on hard disc/in memory/stored in a queue
          1. Document is printed when printer is free/in correct order
            1. Manages backing storage
              1. Ensures data is stored and can be retrieved correctly from any disk drive
                1. Creates and maintains filing systems
                  1. FAT
                    1. File Allocation Table
                    2. NFTS
                    3. Organises files in a hierarchical directory structure
                    4. File Compression
                      1. The amount of data is reduced and the file is mad smaller
                        1. Definiton
                          1. The process of making a file size smaller
                          2. Used to save disk space
                          3. Disk defragmentation
                            1. Fragmented files are split up and stored on different parts of the disk
                              1. Will slow down access speed
                                1. Definition
                                  1. the process of files parts being physically rearranged (into the order required for access)
                                    1. Reorganising
                                      1. moving
                                        1. re-ordering
                                    2. Manages Memory (RAM)
                                      1. Ensures that ...
                                        1. programs/data do not corrupt eachother
                                          1. all programs and data including itself is stored in a proper memory location
                                        2. Manages processes
                                          1. Ensures that...
                                            1. different processes can utilise the CPU without interfering and crashing with one another
                                              1. all tasks appear to run simultaneously
                                            2. Manages Security
                                              1. Allows users to..
                                                1. Create and delete user accounts
                                                  1. Logon
                                                    1. Change passwords
                                                  2. Providing a user interface
                                                    1. provides a CLI
                                                      1. Allows users to have more than one window open
                                                        1. provides a GUI
                                                          1. provides users with error/help messages
                                                            1. allows customisation of interface
                                                              1. allows user to switch between tasks
                                                                1. allows access to system setting as hardware
                                                                Show full summary Hide full summary

                                                                Similar

                                                                Computing Hardware - CPU and Memory
                                                                ollietablet123
                                                                SFDC App Builder 2
                                                                Parker Webb-Mitchell
                                                                Data Types
                                                                Jacob Sedore
                                                                Intake7 BIM L1
                                                                Stanley Chia
                                                                Software Processes
                                                                Nurul Aiman Abdu
                                                                Design Patterns
                                                                Erica Solum
                                                                CCNA Answers – CCNA Exam
                                                                Abdul Demir
                                                                Abstraction
                                                                Shannon Anderson-Rush
                                                                Spyware
                                                                Sam2
                                                                HTTPS explained with Carrier Pigeons
                                                                Shannon Anderson-Rush
                                                                Data Analytics
                                                                anelvr