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Included is a benchmarking guide to the salaries offered in vacancies that have cited React over the 6 months to 29 August 2019 with a comparison to the same period in the previous 2 years.  \nReact JS Trend 2019  \nThis chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing React.  \nInterview Question  \nLet us start by taking a look at some of the most frequently asked React JS interview questions:  \nQ1 . What is React?  \n● React is a front-end JavaScript library developed by Facebook in 2011.  \n● It follows the component based approach which helps in building reusable UI components.  \n● It is used for developing complex and interactive web and mobile UI.  \n● Even though it was open-sourced only in 2015, it has one of the largest communities supporting it.  \nQ2 . What are the features of React?  \nMajor features of React are listed below:  \n● It uses the virtual DOM instead of the real DOM.  \n● It uses server-side rendering.  \n● It follows uni-directional data flow or data binding.  \nQ3 . List some of the major advantages of React.  \nSome of the major advantages of React are:  \n● It increases the application’s performance  \n● It can be conveniently used on the client as well as server side  \n● Because of JSX, code’s readability increases  \n● React is easy to integrate with other frameworks like Meteor, Angular, etc  \n● Using React, writing UI test cases become extremely easy  \nQ4 . What are the limitations of React?  \nLimitations of React are listed below:  \n● React is just a library, not a full-blown framework  \n● Its library is very large and takes time to understand  \n● It can be little difficult for the novice programmers to understand  \n● Coding gets complex as it uses inline templating and JSX  \nQ5 . How React works? How Virtual-DOM works in React?  \nReact creates a virtual DOM. When state changes in a component it firstly runs a “diffing” algorithm, which identifies what has changed in the virtual DOM. The second step is reconciliation, where it updates the DOM with the results of diff.  \nThe HTML DOM is always tree-structured—which is allowed by the structure of HTML document. The DOM trees are huge nowadays because of large apps.  \nThe Virtual DOM is an abstraction of the HTML DOM. It is lightweight and detached from the browser-specific implementation details.  \nReact JS Interview Question  \nQ6 . Differentiate between Real DOM and Virtual DOM.  \n\n| Real DOM | Virtual DOM |\n| --- | --- |\n| 1. It updates slow. | 1. It updates faster. |\n| 2. Can directly update HTML. | 2. Can’t directly update HTML. |\n| 3. Creates a new DOM if element updates. | 3. Updates the JSX if element updates. |\n| 4. DOM manipulation is very expensive. | 4. DOM manipulation is very easy. |\n| 5. Too much of memory wastage. | 5. No memory wastage. |","cbCaijydAPIvWMvI","https://ap.wps.com/l/cbCaijydAPIvWMvI","pdf",452314,32,"English","# Interview Questions\n## Q1. What is React?\n## Q2. What are the features of React?\n## Q3. List some of the major advantages of React\n## Q4. What are the limitations of React?\n## Q5. How React works? How Virtual-DOM works in React?\n## Q6. Differentiate between Real DOM and Virtual DOM","[{\"question\":\"What is React, and who developed it?\",\"answer\":\"React is a front-end JavaScript library developed by Facebook in 2011. It uses a component-based approach to build reusable UI components.\"},{\"question\":\"What are React’s major features?\",\"answer\":\"React uses a virtual DOM instead of the real DOM, supports server-side rendering, and follows a unidirectional data flow/data binding model.\"},{\"question\":\"What are the limitations of React?\",\"answer\":\"React is a library rather than a full framework. It can be large to learn and novice programmers may find it difficult, and coding can become complex with inline templating and JSX.\"}]","React JS Interview Question - Q1-Q6 | PDF",1790358528,81]