• The primary function of an OS is to act as an intermediary between the computer hardware and the applications software.
  • The function of an OS is to provide a stable, efficient, and secure environment for running computer applications and managing computer resources.
  • The OS allocates system resources such as CPU time, memory, input/output devices, and storage devices to running programs. It allocates resources to different applications and manages their use to ensure optimal performance.
  • Here are some of the critical functions of an operating system:-
    1. Process management:

      • The operating system manages the computer’s CPU (Central Processing Unit) and assigns processing time to different programs and processes based on their priority.

    2. Memory management:

      • The operating system manages the computer’s primary memory (RAM) and allocates memory to different programs and processes. It also ensures that each program or process has access to enough memory to run properly.
      • The OS manages the allocation and deallocation of memory for programs and data.
    3. Disk management:
      • Disk management is the process of managing and organizing the storage devices connected to a computer system such as hard disk drives(HDDs), solid-state drives(SSDs), and other removable or external storage devices. 
      • Disk management is essential for maintaining the health and performance of a computer system’s storage devices.
      • By keeping the disk organized and optimized, disk management can improve system performance, reduce the risk of data loss, and ensure the system’s longevity.
      • It involves tasks such as partitioning, formatting, disk cleanup, disk cloning, disk encryption, disk backup, disk recovery, and managing the file system.
    4. File management:

      • The operating system manages the stored or saved files and directories on hard drives, solid-state drives, and other storage devices.
      • The OS provides a hierarchical file system for organizing and accessing files on the computer.
    5. I/O or Device management:

      • The operating system manages input and output devices such as keyboards, mice, printers, scanners, and other peripheral devices.
      • The OS provides drivers for interacting with hardware devices such as printers, scanners, and disk drives.
    6. Security:

      • The operating system provides security features such as user authentication, file permissions, and access control to protect the computer and its data from unauthorized access.
    7. Networking:

      • The operating system provides networking capabilities to allow computers to communicate with other computers & devices and share resources over a network.

    8. User interface:

      • The operating system provides a graphical user interface (GUI) or command-line interface (CLI) for users to interact with the computer and running applications.
    9. Error Detection:

      • The operating system detects errors and faults in hardware and software and provides error messages and alerts to users.



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