.NET / Architecture / Messaging

Modern C# (8–13) Records, pattern matching, nullable reference types, primary constructors, required members. 5 cards Read → ASP.NET Core Essentials Middleware pipeline, Minimal APIs vs Controllers, DI lifetimes. 4 cards Read → .NET 8 / 9 / 10 Highlights What's new since .NET 6 — keyed DI, Native AOT, params collections. 3 cards Read → Entity Framework Core DbContext lifetime, change tracking, migrations, the N+1 trap. 4 cards Read → SQL Server Essentials Indexes, isolation levels, execution plans. 3 cards Read → REST API Design Statelessness, status codes, idempotent verbs, versioning. 3 cards Read → Git Workflow Rebase vs merge, cherry-pick, when each is appropriate. 2 cards Read → Unit Testing (xUnit/NUnit) AAA pattern, mocking, Fact vs Theory, test doubles. 4 cards Read →

SOLID Principles All five, each with a one-line C# example — expect at least one live question on this. 6 cards Read → Clean Code Naming, function size, avoiding primitive obsession and magic strings. 3 cards Read →

Repository Pattern Abstracting persistence behind a collection-like interface. 2 cards Read → Unit of Work Grouping repository operations into one atomic commit. 2 cards Read → Factory Pattern Encapsulating object creation logic, especially 'which implementation' decisions. 2 cards Read → Strategy Pattern — the email's exact exercise The DiscountService refactor, done properly, two ways (classic factory + .NET 8 keyed DI). 6 cards Read → Builder Pattern Step-by-step construction of complex objects, fluent APIs. 2 cards Read → Mediator Pattern Decoupling senders from handlers via a central dispatcher — MediatR in practice. 3 cards Read → CQRS Separating reads from writes — and knowing it doesn't require separate databases. 3 cards Read →

Clean Architecture The dependency rule, and where each pattern above actually lives. 3 cards Read → Domain-Driven Design Entities, value objects, aggregates, bounded contexts, ubiquitous language. 6 cards Read → Event-Driven Architecture Producers, consumers, choreography vs orchestration. 3 cards Read → Distributed Systems Basics CAP theorem, sagas, compensating transactions. 3 cards Read → Sync vs Async Communication When to call directly (HTTP/gRPC) vs go through a broker. 2 cards Read →

NServiceBus: Commands vs Events Grounded directly in the quickstart tutorial they linked — read this twice. 6 cards Read → RabbitMQ Fundamentals Exchanges, queues, bindings, routing. 3 cards Read → Queue & Message Handling Delivery guarantees, message ordering, consumer scaling. 3 cards Read → Retry & Dead Letter Queue What happens when a handler throws. 3 cards Read → Idempotent Consumers Why 'at-least-once delivery' forces this, and how to actually implement it. 3 cards Read → Azure Essentials (nice-to-have) Service Bus vs Storage Queues, Functions triggers. 2 cards Read →

Your Own Projects — Rehearse These The email explicitly told you to prep real examples from your CV. These prompts are built from it. 7 cards Read → Interview Execution Tips How to handle the moments that aren't about knowing the answer. 2 cards Read →