These are LLD questions of the kind Infosys actually asks — the patterns that keep coming back in Infosys's AI project interviews, where what matters is applying LLD sensibly for clients rather than research depth. 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.
Infosys LLD concept questions
A common Infosys machine-coding question: design a simple inventory management system for a retail store — add stock, sell items, low-stock alerts.
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The store wants to support festival discounts, loyalty-member discounts, and bulk-purchase discounts, sometimes combined. Which pattern from this course applies directly?
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Why should Inventory's business logic not directly contain SQL queries or file I/O code?
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How to use this page: Infosys 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 Infosys LLD rounds test — and the Infosys exam guide covers the rest of their selection process.