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55 interview questions on Reactfor developers (2023)

Test your technical skills before an interview of React with 55 corrected questions. Beginner, Intermediate or Expert level.

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55 questions
Easy
10 votes3854 runs1 comment

Write the missing code to render the children of the UserProfile component.

Web developer
React
props
list
Victor Sabatierat Jan 4, 2022
Easy
9 votes3844 runs0 comment

Write the non-JSX equivalent of the following code:

Web developer
React
jsx
Victor Sabatierat Jan 4, 2022
Easy
7 votes2718 runs0 comment

Call a function on the first render of a React component

Web developer
React
hooks
Clément Devosat Jan 4, 2022
Medium
6 votes3843 runs0 comment

Write a React component as a function

Web developer
React
functions
state
Clément Devosat Jan 4, 2022
Hard
4 votes2788 runs1 comment

Fix the useMemo hook in this React component.

Web developer
React
hooks
Clément Devosat Jan 4, 2022
Easy
4 votes2521 runs0 comment

Which statement(s) are true about hooks?

Web developer
React
hooks
Clément DEVOSat Jan 4, 2022
Hard
4 votes2428 runs1 comment

Write a React component that displays the number 2

Web developer
React
state
useState
Vincent Cotroat Jan 4, 2022
Easy
4 votes1552 runs0 comment

How to optimize a React component to improve its performance?

Web developer
React
performance
Clément Devosat Jan 4, 2022
Medium
4 votes352 runs0 comment

Write a React component that updates the document title with each click and resets to 'React App' when the component unmounts.

Web developer
React
hooks
useState
Vincent Cotroat Apr 5, 2023
Easy
3 votes3865 runs1 comment

Save the state used to display the selected page in a React component.

Web developer
React
state
Clément Devosat Nov 7, 2023
Easy
3 votes2314 runs0 comment

UseState and useEffect in React

Web developer
React
state
useState
useEffect
Vincent Cotroat Jan 4, 2022
Easy
3 votes1828 runs0 comment

Write a React component that displays the sum of two numbers

Web developer
React
components
state
Vincent Cotroat Jan 4, 2022
Hard
3 votes1216 runs0 comment

Optimize a React component by implementing shouldComponentUpdate

Web developer
React
array
shouldComponentUpdate
Clément Devosat Feb 3, 2022
Hard
3 votes1198 runs0 comment

Write a React function that fetches comments and passes them to a component.

Web developer
React
components
Victor Sabatierat Feb 3, 2022
Medium
2 votes2666 runs0 comment

Use useCallback to optimize rendering in React

Web developer
React
usecallback
Clément Devosat Jan 4, 2022
Medium
2 votes2602 runs1 comment

React.Suspense is an API that allows you to wait for something before rendering a component, without blocking the application. It offers a Fallback component.

Web developer
React
components
api
Clément DEVOSat Oct 23, 2023
Hard
2 votes2581 runs0 comment

Which statement(s) is/ are true about Typescript and React

Web developer
React
typescript
Clément DEVOSat Jan 4, 2022
Medium
2 votes1230 runs0 comment

How to submit a form in React

Web developer
React
form
submit
Victor Sabatierat Feb 3, 2022
Hard
2 votes1217 runs0 comment

Fix the following React component:

Web developer
React
state
constructor
Clément Devosat Feb 3, 2022
Easy
2 votes1199 runs0 comment

Improve this React component so that it displays "Green" by default.

Web developer
React
state
component
Victor Sabatierat Feb 3, 2022
React tests