We have listed here Best React JS MCQ Questions for your basic knowledge of React JS. This React JS MCQ Test contains 25 multiple Choice Questions with 4 options. You have to select the right answer to every question.
24th Aug, 2020
Q1. What kind of component import React from 'react' is?
Q2. What is ReactJS?
Q3. Which of following is used to pass data to a component from outside?
Q4. What function allows you to render React content in an HTML page?
Q5. React.js was created by
Q6. Arbitrary inputs of components in React are called
Q7. What is state in React?
Q8. For what "webpack" command is used?
Q9. What create-react-app command do
Q10. How many elements does a react component return?
Q11. in which directory react components are saved?
Q12. Everything in react is a ....................
Q13. Props are __________ into other components.
Q14. React.js Covers only the view layer of the app.
Q15. How can you access the state of a component from inside of a member function?
Q16. Which of the following is the correct data flow sequence of flux concept?
Q17. How many elements does a react component return?
Q18. ReactJS uses _____ to increase performance.
Q19. For controlled components in react
Q20. What are the two ways that data gets handled in React?
Q21. Which of the following option is used to access the state of a component from inside of a member function?
Q22. At the highest level, React components have lifecycle events that fall into
Q23. React is mainly for building ...........
Q24. React supports all the syntax of ........
Q25. Which of the following concepts is/are key to ReactJS?