operating system and its functions

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  • OPERATING SYSTEM

    AND

    ITS FUNCTIONS

  • Presented By:-

    Bhavya Chawla

    9th E

  • Index Introduction

    What is Operating System ?

    Major Functions of Operating Systems

    Types of operating systems

  • Introduction

    The operating system is the core software component of

    your computer. It performs many functions and is, in

    very basic terms, an interface between your computer

    and the outside world. In the section about hardware, a

    computer is described as consisting of several component

    parts including your monitor, keyboard, mouse, and

    other parts.

  • What is an Operating System ?

    The operating system is the most important program that runs on

    a computer. Every general-purpose computer must have an

    operating system to run other programs. Operating systems

    perform basic tasks, such as recognizing input from the keyboard,

    sending output to the display screen, keeping track of files

    and directories on the disk, and controlling peripheral devices such

    as disk drives and printers.

  • Major Functions of Operating System

    Providing an interface to the user.

    Managing system resources.

    Managing security and access rights.

    Running applications

    Process Management

    Memory Management

    Extended Machine

    Mastermind

  • PROCESS MANAGEMENT

    By process management OS manages

    many kinds of activities :-All process from start to shut down

    Creation and deletion of user and system

    processes.

  • MEMORY

    MANAGEMENT

    The major activities of an operating regard to

    memory-management are:-

    Decide which process are loaded into

    memory when memory space becomes

    available.

    Allocate and deallocate memory space as

    needed.

  • FILE MANAGEMENT

    The file management system allows

    the user to perform such tasks:-

    Creating files and directories

    Renaming files

    Coping and moving files

    Deleting files

  • SECURITY MANAGEMENT

    By security management OS

    manages many tasks such as:-Alert messages

    Dialogue boxes

    Firewall

    Passwords

  • COMMAND INTERPRETER

    A command interpreter is an interface between

    system and the user. There are two types of

    user interface:-

    Command line

    Graphical user interface

  • Types of Operating System

    Real-time operating system(RTOS)

    Distributed Operating System

    Linux Operating System

    The Windows Operating System

    The Graphical User Interface

  • REAL TIME OPERATING SYSTEM

    (RTOS)

    A real-time operating system (RTOS) is an operating

    system (OS) intended to serve real-time applications that

    process data as it comes in, typically without buffer

    delays. Processing time requirements (including any OS

    delay) are measured in tenths of seconds or shorter

    increments of time. They either are event driven or time

    sharing. Event driven systems switch between tasks

    based on their priorities while time sharing systems

    switch the task based on clock interrupts.

    https://en.wikipedia.org/wiki/Operating_systemhttps://en.wikipedia.org/wiki/Real-time_computing

  • DESTRIBUTED OPERATING

    SYSTEM

    Second is a higher-level collection of system management

    components that coordinate the node's individual and

    collaborative activities. These components abstract

    microkernel functions and support user applications.

    The microkernel and the management components

    collection work together. They support the systems goal

    of integrating multiple resources and processing

    functionality into an efficient and stable system. This

    seamless integration of individual nodes into a global

    system is referred to as transparency, or single system

    image; describing the illusion provided to users of the

    global systems appearance as a single computational

    entity.

    https://en.wikipedia.org/wiki/Single_system_image

  • LINUX OPERATING SYSTEM

    Linux is one of popular version of UNIX operating System. It is open

    source as its source code is freely available. It is free to use. Linux was

    designed considering UNIX compatibility.

    Components of Linux System

    Kernel Kernel is the core part of Linux. It is responsible for all major

    activities of this operating system. It consists of various modules and it

    interacts directly with the underlying hardware. Kernel provides the

    required abstraction to hide low level hardware details to system or

    application programs.

    System Library System libraries are special functions or programs

    using which application programs or system utilities accesses Kernel's

    features. These libraries implement most of the functionalities of the

    operating system and do not requires kernel module's code access

    rights.

    https://upload.wikimedia.org/wikipedia/commons/0/03/Linus-linux.ogghttps://upload.wikimedia.org/wikipedia/commons/0/03/Linus-linux.ogghttps://upload.wikimedia.org/wikipedia/commons/0/03/Linus-linux.ogghttps://upload.wikimedia.org/wikipedia/commons/0/03/Linus-linux.ogg

  • THE WINDOWS OPERATING

    SYSTEM

    Windows OS, computer operating system(OS) developed

    by Microsoft Office to run personal computer(PCs). Featuring the

    first graphical user Interface(GUI) for IBM-compatible PCs, the

    Windows OS soon dominated the PC market. Approximately 90

    percent of PCs run some version of Windows.

    The first version of Windows, released in 1985, was simply a GUI

    offered as an extension of Microsofts existing disk operating

    system, or MS-DOS. Based in part on licensed concepts that Apple

    Inc. had used for its Macintosh System Software, Windows for the

    first time allowed DOS users to visually navigate a virtual desktop,

    opening graphical windows displaying the contents of electronic

    folders and files with the click of a mouse button, rather than

    typing commands and directory paths at a text prompt.

  • GRAPHICAL USER INTERFACE

    The graphical user interface ,is a type of user interface that

    allows users to interact with electronic devices through

    graphical icons and visual indicators such as secondary notation,

    instead of text-based user interfaces, typed command labels or text

    navigation. GUIs were introduced in reaction to the perceived

    steep learning curve of command-line interfaces (CLIs), which

    require commands to be typed on a computer keyboard.

  • Mobile OS

    Google Android OS

    Apple iOS

    BlackBerry

    Symbian OS

    Windows 8

  • THANK

    YOU

    FOR

    WATCHING

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