What’s your approach to high availability and fault tolerance?

Short answer: I design for redundancy—using multiple instances behind load balancers, and designing services to be stateless where possible.

Explain a bit more

In .NET Core, this often means using resilient patterns like circuit breakers and retries with Polly. We also implement health checks and monitoring (Azure Monitor, Application Insights) to detect issues early. For critical data, backups and failover strategies are baked in. The goal is minimizing downtime and graceful degradation rather than “perfect uptime” which is often unrealistic.

Real-world example (ShopNest)

Managers care that you communicate early, protect quality, and help the ShopNest team deliver predictably.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.