Operating system

Operating system

1. User Management

   • Authentication
     • Biometrics
       • Checking to see if it is the right user by use of fingerprint or face ID
     • Passwords
       • Checking it is the right user by a code to unlock the device
   • Interface
     • Comand Line
       • Every function on the computer is accessed by the comand line which is more complicated to use but is less likely to crash
     • GUI
       • Graphical representations of the computer’s functions are shown to the user

2. Peripheral Management

   • Drivers
     • A device driver maps the operating system’s commands to the device’s commands
   • Plug and play
     • With "Plug and play" the driver is stored on the device

3. Process Management

   • Pages
     • Each program is given a "page" of Ram that they can use which prevents stealing of data
     • The program thinks this is the whole Ram of the computer so never asks for more
   • Multitasking
     • Each program is alocated a "page" when multitasking but if there are too many programs it can run slowly
   • Virtual memory
     • If all of the Ram is used up "virtual memory" is created within the secondary storage although this is slow

4. File Management

   • Levels of access
     • Read only
       • The user can access files but not alter them
     • Read-Write
       • Can access files and alter them
       • The more people with this level of access the less secure it is
   • Managing files
     • Copy
       • The user can copy files
     • Delete
       • The user can delete files
     • Move
       • The user can move files
     • Folders
       • The OS stores files in folders