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HackerEarth

Frontend Engineer

React useMemo Functionality

Medium

ROUND 1general_knowledgeCandidate Not Selected

React Optimization

Consider the following React component using useMemo. Why might useMemo not behave as expected in this example? Explain how useMemo works, what dependency arrays do, and when useMemo should or should not be used.

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.