Follow-up · depth 6
Design a small subsystem that relies on ASP.NET Core Middleware Pipeline
Design a small subsystem that relies on ASP.NET Core Middleware Pipeline
Answers use simple, clear English.
Quick interview answer
Sketch components, data flow, failure modes, and metrics around ASP.NET Core Middleware Pipeline. Example shape: Custom correlation ID middleware adds X-Request-Id header before logging middleware runs.
Detailed answer
Mini design using ASP.NET Core Middleware Pipeline: • Components: API edge, worker/queue, store, and observability. • Data flow: request → ASP.NET Core Middleware Pipeline-related path → response/async side effects. • Failure modes: timeouts, overload, partial dependency loss. • Metrics: latency, errors, saturation for the ASP.NET Core Middleware Pipeline path. Guardrails: Follow Microsoft template order; use MapWhen for branch pipelines. Parent context: Common mistakes: Placing UseAuthentication after UseAuthorization; forgetting UseRouting. Best practices: Follow Microsoft template order; use MapWhen for branch pipelines.
Full explanation
Interviewers want a crisp architecture story anchored on ASP.NET Core Middleware Pipeline, not a buzzword list. Request flows through middleware chain: Exception → HTTPS → Routing → Auth → Endpoints. Each can short-circuit or call next(). Order matters critically.
Follow-up questions
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Parent context — ASP.NET Core Middleware Pipeline
Common mistakes: Placing UseAuthentication after UseAuthorization; forgetting UseRouting. Best practices: Follow Microsoft template order; use MapWhen for branch pipelines.
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