How would you answer an interview scenario involving query performance and generated SQL in Entity Framework Core?
For an interview scenario involving query performance and generated SQL, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. EF Core translates LINQ expressions into provider-specific SQL that should be inspected for important workloads. In this scenario, a frequently called query is slow. Explain how you would separate EF overhead from database execution cost. For production, use logging, ToQueryString, database execution plans, projections, indexes, and measured benchmarks. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.