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React Patterns

React-specific interview questions and patterns

10 questions

🐣 4🦖 6

🐣

Hatchling

Intermediate

Reconciliation, keys, controlled components — the fundamental questions every React interview starts with.

HOCs, render props, custom hooks, Context vs Redux — the architecture questions that test your design thinking.

Event delegation, throttling, debouncing, IntersectionObserver — the browser questions interviewers love to ask.

ARIA roles, accessible autocomplete, keyboard navigation — the a11y questions that show you build for everyone.

🦖

Advanced

useEffect vs useLayoutEffect, dependency arrays, useRef, stale closures — the hooks questions that reveal your depth.

Re-renders, memoization, virtualization — the performance questions that separate juniors from seniors.

Where to make API calls, race conditions, stale data — the async questions that test your real-world experience.

Design infinite scroll, scalable app architecture — the system design questions that test how you think at scale.

Duplicate keys, double renders, memory leaks — the trick questions that catch even experienced React developers.

Build autocomplete, infinite scroll, implement utilities — plus the follow-up questions interviewers ask about YOUR code.