The answer
Design Instagram's feed, Netflix's video player, Twitter's feed, WhatsApp's chat, an autocomplete search system, a multi-step form wizard, or a notification system. Discuss rendering, state management, APIs, and performance.
Frontend Interview Questions Asked by Top Companies
What frontend system design questions are asked at top companies?
More FAQs in Frontend Interview Questions Asked by Top Companies
Closures, the event loop, polyfills (map, filter, reduce, bind), debounce (Flipkart), throttle (Walmart), currying sum(1)(2)(3) (Amazon), call/apply/bind, prototypes, event bubbling (Oyo), event delegation, async/defer (Ola), and CORS.
OTP input, progress bar, autocomplete search bar, pagination, tab form, file explorer, food ordering app, image carousel, accordion, and modal. Practice building each in 90 minutes.
Hooks (useState, useEffect, useMemo, useCallback, useRef), reconciliation, virtual DOM, keys, custom hooks (useDebounce, useFetch), context vs Redux, and performance optimization (memo, lazy loading, code splitting).
Still have questions?
Browse all our FAQs or reach out to our support team
Want to upskill yourself?
Your learning library
Small steps. Big possibilities.
Find your next course. Build something great.