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React JS Multiple choice interview questions (MCQ) - Test your React JS knowledge

  1. Everything in React is a _____________
  2. In which directory React Components are saved?
  3. How many elements does a react component return?
  4. What is state in React?
  5. What is Babel?
  6. What does the "webpack" command do?
  7. What port is the default where the webpack-dev-server will run?
  8. What is ReactJS?
  9. What are the two ways that data gets handled in React?
  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 05, 2021,
Posted in Interview Questions,
20 Questions
React JS MCQ

Take React Js Quiz To test your Knowledge.

Below are few React Js MCQ Quiz test that checks your basic knowledge of React JS. This React Js Test contains around 10 questions of multiple choice with 4 options. You have to select the right answer to a question. You can see the correct answer by clicking view answer link.

Also, Read Best React interview questions.

  • Module
  • Component
  • Package
  • Class
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  • Inside js/components/
  • Inside vendor/components/
  • Inside external/components/
  • Inside vendor/
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  • 2 Elements
  • 1 Element
  • Multiple Elements
  • None of These
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  • A persistant storage.
  • An internal data store (object) of a component.
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  • A transpiler.
  • An interpreter
  • A Compiler
  • Both Compiler and Transpilar
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  • Transpiles all the Javascript down into one file
  • Runs react local development server.
  • A module bundler
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  • Server side Framework
  • User-interface framework
  • A Library for building interaction interfaces
  • None of These
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  • state & props
  • services & components
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  • setState
  • render with arguments
  • props
  • PropTypes
Read Best: React js Interview questions
View Answer
  • 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
  • Router
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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 mike
  • Jordan Lee
  • Jordan Walke
  • Tim Lee
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  • Apple
  • Facebook
  • Twitter
  • Google
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