Be able to discuss Design Patterns (Factory, Singleton), Microservices , and Database Optimization . Want to dive deeper? I can help you: Practice a mock technical screen for a specific .NET role.
Alex sat across from the Lead Architect. After a decade of work, five years is where interviewers stop asking what a "class" is and start asking why you’d use a "struct" instead.
for legacy-to-modern migration questions. Let me know which area you'd like to focus on first . .NET Interview Questions and Answers (With Code Examples) .net Interview Questions And Answers For 5 Years Experience
to specific behavioral questions from your own experience.
"We have a high-traffic microservice. How would you handle memory management and prevent performance bottlenecks?" The Answer: Alex didn't just mention Garbage Collection (GC) . He explained the three generations of GC (0, 1, and 2) and how frequent "Generation 2" collections can cause "stop-the-world" pauses. He suggested using Span and Memory to reduce heap allocations and talked about the benefits of IHttpClientFactory over manually creating HttpClient to prevent socket exhaustion. The Design Challenge: Architecture & Patterns Be able to discuss Design Patterns (Factory, Singleton),
"Tell me about a time you resolved a critical production issue." The Answer: Alex described a time a database deadlock brought down a payment service. He explained his process: using Application Insights to trace the failure, identifying a missing index that caused table scans, and implementing Optimistic Concurrency in Entity Framework Core to handle simultaneous updates without locking the whole table. Key Takeaways for Your Interview
"How do you ensure your code is maintainable as the team grows?" The Answer: Alex pointed to SOLID principles , specifically focusing on the Dependency Inversion Principle . He explained how Dependency Injection (DI) in ASP.NET Core allows for better unit testing by swapping real services with mocks. He also discussed Middleware in the request pipeline for cross-cutting concerns like global exception handling and authentication. The Scenario Challenge: Real-World Troubleshooting Alex sat across from the Lead Architect
This is the story of Alex, a developer with five years of experience, preparing for a senior .NET role. It weaves together the specific technical and scenario-based questions you'll likely face at this career stage. The Technical Challenge: Beyond the Basics