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A technical preview of an Operating System

Operating System (OS):


An Operating system consists of a set of programs which controls, co-ordinates and supervises the activities of the various components of a computer system. Its function is to link between the computer hardware and the user.


An operating system is a software or a series of programmes, which performs various types of functions in order to manage and organize file so".


Objectives:

 There are lot of objectives of an operating system, actually it covers the birth of a perfect operating system. A user is just like a wanting animal they just want everything. But as a developer we are just tying to make our software more & more better as per user requests. These are some main objectives ------

  • To describe the basic organization of computer systems.
  • To provide a grand tour of the major components of operating systems.
  • Provide more convenient environment for users.
  • Provide maximum utilized performance to users as per hardware existance.


Computer Startup:

When a computer starts up there are lot of services and programs are executed in our systems. There is a main program named Bootstrap Program is loaded firstly when a system rebooted or power-up.

This Bootstrap program is typically stored in ROM or EPROM, it is generally known as firmware of a computer. After executing this program it initializes the all aspects of that system and then loads system kernal and then starts executing the operating system programs.


FIRMWARE:

A Firmware is data that is stored on a computer or other hardware device's ROM (read-only memory) that provides instruction on how that device should operate. Unlike normal software, firmware cannot be changed or deleted by an end-user without using special programs, and remains on that device whether it's on or off.


Some important functions of an Operating System:

  • Memory Management
  • Process Management
  • Device Management
  • File Management
  • Security
  • Control over System Performance
  • Job Accounting
  • Error Detection 

 

Continued.............................................

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