These are LLD questions of the kind Flipkart actually asks — the patterns reported from Flipkart's AI-engineering rounds, where design trade-offs, scale and failure modes matter as much as definitions. Treat this page as a mock interview: say every answer out loud before revealing it. If one surprises you, the lesson behind it is linked at the bottom.
Flipkart LLD concept questions
Flipkart's LLD rounds often ask for a discount/coupon engine that supports multiple simultaneous discount types (flat, percentage, buy-one-get-one) on a cart.
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Two customers add the last unit of a product to their cart at nearly the same time, and both proceed to checkout. What must the design guarantee, and which earlier lesson in this course solves the identical problem?
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An order moves through PLACED → PACKED → SHIPPED → DELIVERED (or CANCELLED/RETURNED). How would you model this, and what should NOT be allowed?
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How to use this page: Flipkart rarely asks something you've never seen — they ask a standard LLD concept and then push one level deeper ("why?", "what would you do if..."). Master the concept in the LLD course lessons, and the follow-up stops being scary.
Keep practising: SOLID Principles, Strategy Pattern, Design a Parking Lot and UML Diagrams cover what most Flipkart LLD rounds test.