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

Take React Js Quiz To test your Knowledge.

Below are few React Js MCQ 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.

1. Everything in React is a _____________

  • Module
  • Component
  • Package
  • Class
View Answer

2. In which directory React Components are saved?

  • Inside js/components/
  • Inside vendor/components/
  • Inside external/components/
  • Inside vendor/
View Answer

3. How many elements does a react component return?

  • 2 Elements
  • 1 Element
  • Multiple Elements
View Answer

4. What is state in React?

  • A persistant storage.
  • An internal data store (object) of a component.
View Answer

5. What is Babel?

  • A transpiler.
  • An interpreter
  • A Compiler
  • Both Compiler and Transpilar
View Answer

6. What does the "webpack" command do?

  • Transpiles all the Javascript down into one file
  • Runs react local development server.
  • A module bundler
View Answer

7. What port is the default where the webpack-dev-server will run?

  • 3000
  • 8080
  • 3306

8. What is ReactJS?

  • Server side Framework
  • User-interface framework
  • A Library for building interaction interfaces
View Answer

9. What are the two ways that data gets handled in React?

  • state & props
  • services & components
View Answer

10. In React what is used to pass data to a component from outside?

  • setState
  • render with arguments
  • props
  • PropTypes
View Answer
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