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Uses immutable image identity, controlled promotion, registry security, and deliberate base-image rebuilding instead of mutable latest tags.
Designs useful local database and cache resources without confusing container lifetime, durable data, bind mounts, parameters, and production secrets.
Explains bind addresses, published ports, internal DNS, service identity, and why localhost changes meaning across container boundaries.
Explains process isolation, shared kernels, image-based deployment, and where containers differ operationally from virtual machines.
Distinguishes request and response media types and designs predictable negotiation, rejection, documentation, and caching behavior.
Compare endpoint styles in real services, including organization, conventions, testing, filters, and OpenAPI behavior.
Explains sampling, high-cardinality labels, retention, cost, and keeping enough signal for incident diagnosis.
Explains deployment markers, version telemetry, feature-flag state, commit traceability, and incident diagnosis after releases.
Explains browser same-origin enforcement, preflight requests, credentials, middleware behavior, and why CORS is not authorization.
Implements a word-frequency counter with normalization, punctuation handling, and stable ordering.
Applies CQRS proportionally, separating model responsibilities without assuming separate databases, messaging, or event sourcing.
Explains what belongs in runbooks, how on-call handoff preserves context, and how operational docs stay useful.
Explains database constraints versus application validation with practical .NET data-access examples and production trade-offs.
Distinguishes instants, local calendar values, offsets, and named time zones so APIs and persistence survive daylight-saving and locale boundaries.
Uses deadlock evidence to correct EF Core transaction scope, query plans, and resource order, with bounded retries only for repeat-safe victims.
Debugs ASP.NET Core authentication challenges and authorization forbids across schemes, token validation, policies, claims, tenants, and resource checks.
Uses resource state, structured logs, traces, metrics, health, and configuration evidence to isolate a cross-service failure.
Handle a production support case where logs exist but related request events cannot be connected.
Improve diagnosis when App Service log stream does not show enough information during an incident.
Diagnose App Service app settings that reference Key Vault secrets but fail at runtime.
Diagnose a deployment slot swap that fails because the target app does not warm up successfully.
Identify a failed App Service deployment caused by a mismatched .NET runtime or publish target.
Diagnose and recover from a production failure caused by rotated secrets or stale secret references.
Investigate SQL timeouts that appear after a new .NET API release.