What follow-up questions does Swiggy ask after the food ordering app?
How would you scale for 10,000 items (virtualization, pagination, server-side search)? How would you persist the cart (localStorage, backend)? How would you handle concurrent updates (optimistic UI)? How would you add coupons (discount code on total)?
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More FAQs in Food Ordering App: Swiggy Interview Experience
Build a food ordering app with a menu, search, filters (veg/non-veg, category, price), cart (add, remove, quantity), cart total, and checkout. 90 minutes. They evaluate functionality, code quality, edge cases, UI, and approach.
The cart logic. Managing add, remove, quantity change, and total calculation. Use an object mapping item ID to quantity. Handle quantity 0 (remove from cart). Calculate total by summing price * qty for each item.
10 min: plan data and state. 40 min: build menu rendering and cart. 20 min: add search and filters. 10 min: handle edge cases. 10 min: CSS and testing. Build cart logic first (it is the hardest part).
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