OPERATING SYSTEM

OPERATING SYSTEM

1. concept

   • A software that acts an interface between computer hardware components and the user

2. Examples

   • windows
   • Linux
   • Mac OS
   • linux

3. Estructure

   • the file manager
   • Kernel
   • task manager
   • the memory manager
   • the operating system loader
   • the shell

4. functions

   • Memory Managment
   • processor management
   • file management
   • device management
   • I/O management
   • Security
   • networking

5. types

   • multitasking
   • multiprocessing
   • real time OS
   • network OS
   • Batch operating system
   • mobile OS

6. Advantage

   • Allows you to hide details of hardware by creating an abstraction
   • Easy to use with a GUI
   • operating System acts as an intermediary among applications and the hardware components
   • offers an environment in which a user may execute programs

7. Characteristics

   • Protected and supervisor mode
   • Allow disk access and file systems device drivers networking security
   • program execution
   • Resource allocation
   • Error Detection and handling
   • Information and resource protection

8. Disadvantages

   • if any issu accurs in OS, you may lose all the contents which have been stored in your system
   • Operating systems software is quiet expaensive for small size organization which adds burden on them
   • It is never entirely secure as a threat can accur at any time