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HackerEarth

Frontend Engineer

Understanding React.memo

Medium

ROUND 1general_knowledgeCandidate Not Selected

React Performance

What is React.memo()? Explain what problem it solves, how it works internally, and what the optional comparison function (isEqual) is used for. Also, explain the difference between React.memo() and useMemo().

This question was asked in

HackerEarth Frontend Engineer Interview Experience

The HackerEarth interview process involved a single round and covered a broad range of topics related to CSS, JavaScript, and React. Candidates can expect questions focused on event handling, CSS layout properties, and the workings of React hooks and components. Overall, the interview presented a moderate difficulty level, challenging candidates to demonstrate both their technical knowledge and practical coding skills.