Interview Q&A

Short answer: configure them Default max request body size is 30 MB. Configure via RequestSizeLimit attribute or KestrelServerOptions.Limits.MaxRequestBodySize. For IIS, adjust maxAllowedContentLength.

Real-world example (ShopNest)

A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.

Short answer: Add ResponseCompression middleware. Register compression providers (AddResponseCompression()) in Program.cs. Configure supported MIME types and compression level.

Real-world example (ShopNest)

A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.

Short answer: System.Text.Json: Default in .NET Core 3+, fast, built-in, less feature-rich. Newtonsoft.Json: More mature, supports advanced scenarios (e.g., polymorphic deserialization). Can switch to Newtonsoft by adding AddNewtonsoftJson() in MVC options.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.