Operating System Overview

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An operating system is software that manages a computer’s hardware, serves as a foundation for application software, and serves as a bridge between the computer user and the computer hardware. The operating system is a critical component of a computer system’s system software. This course will walk you through a step-by-step process of learning Operating System basics while using real examples.

To study the role of an operating system in a modern computing environment, it is necessary to first know the organization and architecture of computer hardware. This comprises the CPU, memory, I/O (Input/Output) devices, and storage.

What Operating Systems Do?

Operating systems can be found in a variety of places, including household appliances with “Internet of Things” devices, automobiles, cellphones, personal computers, workplace computers, space-travel computers, and cloud computing environments. The operating system is in charge of all processes, resource allocation, CPU management, file management, and a variety of other tasks.

Important functions of an operating system.

  • Memory Management
  • Processor Management
  • CPU Scheduling
  • Process Synchronization
  • Device Management
  • File Management
  • Job accounting
  • Security
  • System performance analytics
  • Error detection
  • Coordination between other software and users

Types of Operating Systems

Batch Operating System

A batch operating system’s users do not interact with the computer directly. Each user prepares his task on an offline device such as punch cards before submitting it to the computer operator. This operating system’s major aim was to shift control from one job to another as soon as the job was done.

Advantage:

  1. The usage of a resident monitor increases computer efficiency by removing CPU time between two processes.

Disadvantage:

  1. Non interactive
  2. Batch processing suffers from starvation

Multiprocessing Operating System

Parallel computing is accomplished by multiprocessing operating system. More than one processor in the system may run many processes at the same time, increasing the system’s throughput.

Advantage:

  1. Reliability
  2. Takes less time

Disadvantage:

  1. Complex and sophisticated CPU architecture

Multitasking Operating System

A multitasking operating system is also a multiprogramming system that allows for the execution of numerous programmes at the same time. It enables a user to execute many computer tasks at the same time.

Advantage:

  1. supports multiple users
  2. memory management

Disadvantage:

  1. CPU generates more heat as multiple processors are busy at the same time.

Real Time Operating System

A real-time system is a data processing system in which the time interval necessary to receive and respond to inputs is so short that it has influence over the environment.

Network Operating System

A Network Operating System (NOS) operates on a server and allows it to manage data, users, groups, security, applications, and other networking operations.

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Learn more about the operating system from Wikipedia https://en.wikipedia.org/wiki/Operating_system.

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