Operating System MindMap

Operating System MindMap

1. Interface

2. User Interface

   • Allows people to interact with the computer
     • GUI (Graphical User Interface)
       • Provides Tiles, Icons and Menu's
         • Keyboard
         • Mouse
         • Touchscreen
     • CLI (Command Line Interface)
       • Text only service
         • Advantages
           • More flexible
           • Less memory
           • Faster

3. Managing the CPU

   • Sequence of steps
     • 1. the program code is found on the storage drive
     • 2. a section of RAM is reserved for the program and space is allocated for the program's data
     • 3. the program code is copied from storage into the reserved space in the memory
     • 4. the CPU program counter is set to the memory location of the first instruction in the program, and execution begins
   • Multitasking
     • OS makes it possible to run several programs at once
       • Programs have three states
         • Running
         • Waiting
         • Runnable