.NET Full-Stack Interview Questions & Answers

1. What is .NET Full Stack?

Answer:
A .NET Full-Stack developer works on:

• Backend → C#, ASP.NET Core, Web API
• Frontend → Angular / React / HTML / JS
• Database → SQL Server / EF Core
• DevOps → Git, CI/CD, Docker, Azure

Meaning: end-to-end application ownership.

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2. What is Middleware?

Answer:
Middleware is a pipeline component that handles HTTP requests & responses.

Each middleware can:

• Process request
• Modify response
• Call next middleware
• Stop pipeline

Order matters.

3. Difference between app.Use() and app.Run()?

Answer:

• Use() → passes control to next middleware
• Run() → terminates pipeline (last middleware)