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
"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
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)
Understand the MVC life cycle , Web API security (JWT tokens), and Middleware .
With five years of experience, you aren't just expected to write code; you're expected to design systems.
The interviewer shifted to behavioral and scenario-based questions, looking for "battle scars".