xUnit

Add a regression test after a role-specific incident

Turns a production-only role and payload failure into the smallest durable API regression test.

Build a non-destructive post-deploy API smoke check

Checks health, authentication, and one critical read flow after deployment without creating persistent business data.

Choose between mocks, stubs, fakes, and real dependencies

Compares test doubles by purpose and explains when a real dependency provides a more trustworthy test.

Choose Testcontainers, SQLite, or EF Core InMemory

Chooses database test infrastructure by the provider behavior a test must prove.

Choose test coverage from change risk

Builds a proportionate test plan from blast radius, failure probability, detectability, and reversibility.

Choose the right test level for a change

Explains how unit, integration, contract, component, and end-to-end tests cover different failure boundaries.

.NET Full Stack

Full-cycle .NET full-stack interview preparation.

A role-based preparation path covering C#, ASP.NET Core APIs, data access, frontend integration, testing, deployment, system design, real-life scenarios, and behavioral interview topics.

.NET Backend

Backend-focused .NET interview preparation.

A backend-focused .NET preparation path covering C#, ASP.NET Core APIs, data access, reliability, testing, and practical coding.

API Testing & Production Debugging Labs

Prove API behavior, reproduce failures, and leave durable regression evidence.

A practical ASP.NET Core track covering authenticated integration tests, capability and ownership boundaries, ProblemDetails, idempotent retries, stable pagination, cancellation, concurrency, database command guards, correlated failures, distributed tracing, connection-pool pressure, health checks, incident regressions, and post-deploy smoke checks.

Testing & Quality Engineering

Choose the right evidence, test realistic boundaries, and keep the suite trustworthy.

A spoken interview track covering test strategy, .NET test design, ASP.NET Core integration, database fidelity, authorization boundaries, durable workers, migration compatibility, performance testing, contracts, and reliable suites.