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DevOps word in itself is a combination of two words one is Development and other is Operations. DevOps is a collaboration of  Development and Operation’s it is not an application or any tool it just provides development and operation process.  DevOps represents a great change in the IT culture   DevOps has become one of the most valuable business disciplines for the enterprises. with the help of DevOps, quality, and speed of application delivery have improved very much.  Developers do not feel work pressure and can build new code in less time.                              There are some important aspects of DevOps ESM (Enterprise Systems Management):  administrators are involved in this phase. These experts brought the key ESM practices to DevOps like configuration management, automated provisioning, system monitoring, and the toolchain approach, etc. Agile Development: DevOps can be considered as an outgrowth of the agile. It is simply extending the Agile principles beyond bou

ReactJS basically is an open-source JavaScript. It is currently one of the most popular JavaScript libraries. It was created by Jordan Walke, who was a software engineer at Facebook. Facebook developed ReactJS in 2011 in its newsfeed section, but it was released to the public in the month of May 2013.  It is maintained by Facebook. It is used for handling the view layer for web and mobile apps.                        these are some important features of React. JSX -  JSX is simple JavaScript which allows HTML quoting and uses these HTML tag syntax to render subcomponents. React Native - react has native libraries which were announced by Facebook in 2015, which provides the react architecture to native applications like IOS, Android and UPD. React basically gives developers the ability to work with a virtual browser that is more friendly than the real browser. After that, your JavaScript skills are what make you a better React developer.

Node.js is an open-source server-side runtime environment built on Chrome's V8 JavaScript engine. it is released under the MIT license Node.js was written by Ryan Dahl.  It is best for network application, real-time chat app, web development, API development. it is also used in production by large companies such as Paypal, Uber, Netflix, Wallmart and so on. its applications will never buffer any data.  it can be used for both scenarios for  Backend environment and you can even use it as front – end environment.                                           Following are the areas where Node.js is proving itself as a perfect technology partner.   I/O bound Applications   Data Streaming Applications   Data-Intensive Real-time Applications (DIRT)  JSON APIs based Applications   Single Page Applications.

AngularJS is an open-source web application framework. It was developed in 2009 by Misko Hevery and Adam Abrons.  It is licensed under the Apache license version 2.0.  It is maintained by Google. It is used in Single Page Application (SPA) projects.it is entirely based on HTML and JavaScript.                                             The AngularJS framework can be divided into three major parts − 1- ng-app − This directive defines and links an AngularJS application to HTML. 2- ng-model − This directive binds the values of AngularJS application data to HTML input controls. 3- ng-bind − This directive binds the AngularJS Application data to HTML tags.

" Ruby on rails " is also known as ROR, it is a web application framework written in ruby. ROR  was released in July 2004. it is distributed under the MIT license.The framework was authored by David Heinemeier Hansson. it promotes the use of web standards such as JSON or XML for data transfer, HTML, CSS, and JavaScript. One of the most important principles of ruby on rails development is CONVENTION OVER CONFIGURATION - It makes the task much easier and it saves the time means the programmer does not have to spend a lot of time configuring files in order to get set up, it comes with conventions which help to speed up the development. RoR consists of several packages such as:   1 - Active Record: it is an architectural pattern that stores information in relational databases.  2- ActiveResource:  this provides Web services.  3- Action Pack: this is management package with control functions.  4- Action Web services: this provides Web services package.  5- Activ