Operating Systems GCSE 1.7

Operating Systems GCSE 1.7

1. Different operating systems

   • Android
   • IOS
   • Linux
   • Mac OS
   • Windows
   • Why Update
     • Fix security issues

2. An operating system is is system software that manages computer hardware and software resources and provides common services for computer programs.

3. User Interfaces

   • Graphical User Interface
     • Visual
     • Easy to use
     • Can be called GUIs
     • Phones
     • Fridges
     • Computers
     • Interacive
     • WIMP- Windows Icons Menus Pointers
   • Menu Driven
     • Cash points
     • Chip and pin machines
     • Successive menus
   • Command line
     • Text Based
     • More efficient than other user interfaces
     • Good for if you want to do something quickly
     • Less resource heavy than Graphical user interfaces
     • Advanced
   • Nataural language
     • It responds to questions in your native language
     • Not always reliable
     • Siri, Cortana
       • Amazon Alexa
     • AI

4. Multitasking

   • Where you have more than one program running at anyone one time
     • Although in reality they aren't running at the same time they just have a small part of processor time each but the change happens so fast we don't notice.
   • Whilst a computer is multitasking it has to manage data very carefully because its constantly getting data from the hard drive to the RAM.

5. Management

   • User
     • Control who has access to different files
     • Profiles
       • Fixed profiles(e.g. school accounts)
         • Can't change settings

6. Backups

   • Full Backup
     • Every single file is copied regardless of whether its changed
       • Will usually be done in companies around once a week
       • Takes a long time.
       • Not very efficient
   • Incremental Backup
     • Only backs up files that have been changed or altered since the last one.
     • More Efficient
     • Quicker
     • Usually completed everyday