Frontend Practical (React): Two Reported Versions

CodingScale AILast reported August 2025Low Frequency
Reported
2× across candidate reports
First seen
February 2025
Last reported
August 2025
Reported outcome
unknown

Problem Overview

A timed, multi-part frontend coding challenge for Scale AI's full-stack role. The second version below was on HackerRank; the first report does not name a platform. Two distinct versions have been reported: Version A (2025-02): Three sequential parts — (1) Implement Promise.all from scratch; (2) Implement a custom React hook…

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  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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