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61 interview questions on Reactfor developers (2024)

Test your technical skills before an interview of React with 61 corrected questions. Beginner, Intermediate or Expert level.

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61 questions
Easy
23 votes4971 runs0 comment

Write the non-JSX equivalent of the following code:

Web developer
react
jsx
Victor Sabatierat Jan 4, 2022
Easy
19 votes4978 runs1 comment

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

Web developer
props
list
Victor Sabatierat Jan 4, 2022
Medium
13 votes5042 runs0 comment

Write a React component as a function

Web developer
react
functions
state
Clément Devosat Jan 4, 2022
Easy
12 votes3781 runs1 comment

Call a function on the first render of a React component

Web developer
react
hooks
Clément Devosat Jan 4, 2022
Easy
9 votes5014 runs1 comment

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

Web developer
state
react
Clément Devosat Nov 7, 2023
Easy
8 votes2800 runs0 comment

Write a React component that displays the sum of two numbers

Web developer
react
components
state
Vincent Cotroat Jan 4, 2022
Easy
7 votes3565 runs0 comment

Which statement(s) are true about hooks?

Web developer
react
hooks
Clément DEVOSat Jan 4, 2022
Easy
7 votes3289 runs1 comment

UseState and useEffect in React

Web developer
state
useState
useEffect
Vincent Cotroat Jan 4, 2022
Easy
6 votes2541 runs0 comment

How to optimize a React component to improve its performance?

Web developer
react
performance
Clément Devosat Jan 4, 2022
Easy
6 votes1345 runs0 comment

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

Web developer
react
state
component
Victor Sabatierat Feb 3, 2022
Easy
6 votes1241 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
6 votes1017 runs2 comments

Use the `useContext` hook to render a button with a dark theme.

Web developer
react
context
hooks
Vincent Cotroat Nov 7, 2023
Easy
5 votes3752 runs1 comment

Find the issue with this React code:

Web developer
react
useCallback
Clément Devosat Jan 4, 2022
Easy
5 votes3696 runs1 comment

Use useCallback to optimize rendering in React

Web developer
react
usecallback
Clément Devosat Mar 15, 2024
Hard
5 votes3473 runs1 comment

Write a React component that displays the number 2

Web developer
react
state
useState
Vincent Cotroat Jan 4, 2022
Hard
5 votes1341 runs0 comment

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

Web developer
react
components
Victor Sabatierat Feb 3, 2022
Easy
5 votes828 runs1 comment

Change the style of a button using the `useState` hook in React.

Web developer
react
state
style
Vincent Cotroat Apr 10, 2023
Hard
4 votes3935 runs3 comments

Fix the useMemo hook in this React component.

Web developer
react
hooks
Clément Devosat Feb 6, 2024
Medium
4 votes1382 runs0 comment

How to submit a form in React

Web developer
form
submit
Victor Sabatierat Feb 3, 2022
Hard
4 votes1358 runs0 comment

Optimize a React component by implementing shouldComponentUpdate

Web developer
react
array
shouldComponentUpdate
Clément Devosat Feb 3, 2022
React tests