Operating System (OS)

Fig: OS
 Operating System is software that manages and handles the hardware and software   resources  of a computer system. It is interface between computer user and computer hardware.  It is low level software  which perform all the basic functions like memory management, Device management, File management etc. The popular operating systems are   windows xp, Windows 7, Windows 8, Windows 10, Windows 11, Mac OS, Unix, Linux etc.

Functions of Operating System

1. Memory Management

2. File Management

3. Device Management

4. Processor Management 

5. Network Management 

6. Storage Management 

7. Security

8. Error detecting aids

1. Memory Management

   The memory management is manage of primary memory or main      memory. Main memory provides a fast storage that can be accessed  directly by the CPU(Central Processing Unit). It keeps track of primary memory. It manage the allocation and deallocation of process.

2. File Management

   File Management is the process of managing a system that  organizing, storing and retrieving file and data stored in different directories.

  • Keeps records of status and location of files  
  • Allocate and deallocate resources 
  • Keep tracks of information    

 3. Device Management 

  • It is also know as I/O controller.
  •  it allocate the devices in the efficient way.
  • It decides which process get the device when and for how much time.
  • Operating System control the working of I/O devices.
4. Processor Management                                                                      When more than one process runs on the system the OS decides how and when a process will use the CPU. This function is called process scheduling.
  • Allocate and deallocated processor (CPU) to a process.  
  • It keep records of CPU status. 
  • In the multiprogramming environment the OS decided the order which process access to the processor and how much programming each process OS.                                                                    
5. Security
   The OS keeps the system and
 programs safe and secure through 
authentication. A user ID and password 
decide the authenticity of the user.
 








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