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Home/Tracks/Infrastructure System Design
Track 12

Infrastructure System Design interview questions

Large-scale infrastructure design, trade-offs, capacity planning, HA patterns.

9 interview questions38 min of mock interviews

Interview questions

Each one is a full mock interview: listen to it, then study the senior answer, diagrams, follow-ups and self-check.

Open in Interview Prep
ExpertSystem design 4 minHow would you keep a trading platform up all through market hours and prove every change to an auditor? Regulated trading platform · Round 1 Start the interview ExpertSystem design 4 minDesign disaster recovery for a trading platform with an RTO under 15 minutes and an RPO near zero. Regulated trading platform · Round 1 Start the interview ExpertSystem design 5 minDesign a UPI payments platform that rides a 10x festival peak without losing or double-charging a payment UPI payments at festival peak · Round 1 Start the interview ExpertSystem design 4 minLeadership wants active-active across two regions for payments. How do you keep transaction state strictly consistent? UPI payments at festival peak · Round 1 Start the interview ExpertSystem design 4 minDesign reconciliation so money is never lost or duplicated, even when services crash mid-payment UPI payments at festival peak · Round 1 Start the interview ExpertSystem design 4 minDesign the home-feed serving path for hundreds of millions of members, fast and degrading gracefully Social feed at hyperscale · Round 1 Start the interview ExpertSystem design 4 minDesign a Kafka event pipeline at massive scale with per-key ordering, safe replay and real backpressure Social feed at hyperscale · Round 1 Start the interview ExpertSystem design 5 minHow would you move a critical stateful service to another data centre with zero downtime? Social feed at hyperscale · Round 1 Start the interview ExpertSystem design 4 minYou have two weeks to ship multi-region failover for live matches, and DNS failover is off the table. What do you build? Live sports streaming · Round 3 Start the interview
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