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React JS MCQ

  1. React.js is a free and open-source front-end .................
  2. React.js was Initially released in ................
  3. React.js had Written in ................
  4. ............. is used in React.js to increase performance?
  5. What is Babel?
  6. Which of the following command is used to create a react app?
  7. .............. port is the default where the webpack-dev-server will run.
  8. A valid react component can return only ......... element.
  9. A state in React.js is also known is ..............
  10. In React what is used to pass data to a component from outside?
  11. How can you access the state of a component from inside of a member function?
  12. Props are __________ into other components
  13. What is a react.js in MVC?
  14. ReactJS uses _____ to increase performance
Last Updated: May 09, 2022,
Posted in Interview Questions,
25 Questions
React JS MCQ

Take React Js MCQ Quiz to Test Your Knowledge.

React Js MCQ: Practice Below the best React Js MCQ Questions that checks your basic knowledge of React Js. This React Js MCQ Test contains 25+ React Js Multiple Choice Questions. So, you have to select the right answer to check your final preparation for your React MCQ Exams & Interviews. Apart from this, you can also download below the React Js MCQ PDF Completely Free.

Also, Read Best React Interview Questions.

  • JavaScript library
  • Bootstrap library
  • CSS library
  • None of the Above
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  • May 29, 2013
  • April 29, 2013
  • June 29, 2013
  • May 29, 2014
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  • Virtual DOM
  • Original DOM
  • Both Original & Virtual DOM
  • None of the Above
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  • A JavaScript transpiler
  • A JavaScript interpreter
  • A JavaScript Compiler
  • None of the above
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  • install -g create-react-app
  • npm install create-react-app
  • npx create-react-app reactapp
  • None of the Above
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  • A permanent storage.
  • An Internal storage of the component.
  • An External storage of the component.
  • All of the above
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  • setState
  • render with arguments
  • props
  • PropTypes
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  • this.getState()
  • this.values
  • this.prototype.stateValue
  • this.state
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  • Methods
  • Injected
  • Both 1 & 2
  • All of the above
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  • Middleware
  • Controller
  • Model
  • View
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  • Original DOM
  • Virtual DOM
  • Both 1 & 2
  • None of above
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  • Do not requires to be unique
  • Unique in the DOM
  • Unique among the siblings only
  • All of the above
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  • Dispatcher->Action->Store->View
  • Action->Dispatcher->View->Store
  • Action->Dispatcher->Store->View
  • Action->Store->Dispatcher->View
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  • Jordan Walke
  • Rasmus Lerdorf
  • Miško Hevery
  • None of the above
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  • revokeDefault()
  • preventDefault()
  • avoidDefault()
  • None of the Above
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  • Database
  • User interface
  • Connectivity
  • Design platform
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  • props
  • elements
  • components
  • None of the Above
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  • this.State{}
  • this.setState
  • this.setChangeState
  • None of the Above
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