How do I explain authentication in a React interview?
Explain your approach, the auth context, how you protect routes, and how you persist the user across reloads. Be ready to discuss trade-offs like Firebase vs custom JWTs, and specifics from your project.
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More FAQs in Interview Questions on Advanced Features in a React Project
Explain your choice of WebSockets or polling, why you chose it, and how you manage the connection and clean up on unmount. Specifics about the library, reconnection, and cleanup show real experience.
Explain the recursive component pattern where a Comment component renders its own replies, the tree data structure, and how you update immutably when adding replies. This tests data modeling and recursion in React.
Connect each optimization to the problem it solves. Stable keys for tracking, lazy-loaded thumbnails for initial load, memoization for re-renders, and windowing for long lists. Specifics show real, measured work.
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