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Why might you choose Tailwind CSS over Bootstrap or traditional CSS?
Tailwind is utility-first (compose from atomic classes); Bootstrap is component-first (pre-built components). Tailwind gives a tiny purged bundle, design consistency via a config-driven token system, no naming or context-switching, and full design freedom. Bootstrap is faster for generic UIs but produces sites that look the same and harder to customize. Traditional CSS scales poorly without conventions.
What is your experience with Redux, Redux Toolkit, or other state management libraries?
Redux: a single store, state changed only via dispatched actions run through pure reducers, predictable and debuggable. Redux Toolkit (RTK) is the modern standard — slices, Immer, built-in thunks, less boilerplate. Know when you actually need it vs Context/Zustand/server-state libs.
How would you implement debouncing in JavaScript?
Debounce delays running a function until it stops being called for a set wait time — each call resets a timer. Implement with a closure over a timer id: clear the previous timeout and set a new one. Used for search-as-you-type, autosave, and resize handlers.
What is React Strict Mode and how does it affect development?
Strict Mode is a dev-only React wrapper that surfaces unsafe patterns: double-invokes components/effects/state initializers, warns on deprecated APIs (legacy refs, findDOMNode), forbids side-effects in render. The double-mount in React 18 specifically reveals missing useEffect cleanups. Production is unchanged. Always wrap the app in <StrictMode> during development.
Tell me about a time you delivered a frontend feature under a tight deadline. How did you prioritize and execute?
STAR answer: a real feature with a hard date. Emphasize how you scoped down to must-haves, sliced into shippable increments behind a flag, communicated risk early, and protected non-negotiables. The result should show you hit the date without quietly sacrificing quality.