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17 interview questions on React (legacy)for developers (2025)

Test your technical skills before an interview of React (legacy) with 17 corrected questions. Beginner, Intermediate or Expert level.

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Easy
7 votes1439 runs0 comment
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How to submit a form in React

Web developer
form
submit
Victor Sabatierat Feb 3, 2022
Easy
3 votes1512 runs0 comment
Medium
3 votes1475 runs0 comment

Fix the following React component: Scroller

Web developer
react
event
performance
Victor Sabatierat Feb 3, 2022
Medium
2 votes1487 runs0 comment

Optimize the following React component:

Web developer
react
components
Victor Sabatierat Feb 3, 2022
Medium
2 votes1461 runs0 comment
Hard
2 votes1458 runs0 comment
Easy
2 votes1447 runs0 comment
Hard
1 vote1442 runs
1 comment
Medium
0 vote1477 runs1 comment
Hard
0 vote1455 runs0 comment

Find the problem(s) in this React code:

Web developer
react
props
return
Victor Sabatierat Feb 3, 2022
Hard
0 vote1441 runs0 comment
Medium
-1 vote1502 runs2 comments