ASP.NET Core Configuration & Logging 2

Question 1

Which interface is used to write log messages in ASP.NET Core applications?

Accepted Answer

ILogger<T>

Answer

ILogger<T> is the generic logging interface injected via DI, scoping logs to the category name derived from T.

Question 2

What is the lowest severity log level in ASP.NET Core logging?

Accepted Answer

Trace

Answer

Trace is the most verbose level, intended for detailed diagnostic messages, typically disabled in production.

Question 3

Which method logs a message at the Error level using ILogger?

Accepted Answer

logger.LogError(message)

Answer

ILogger provides convenience methods like LogError(), LogWarning(), and LogInformation() for each log level.

Question 4

What does the Logging:LogLevel:Default configuration key control?

Accepted Answer

The minimum log level for all categories that don't have a specific override

Answer

Logging:LogLevel:Default sets the baseline minimum severity; categories with specific entries override this default.

Question 5

Which NuGet package provides structured logging with Serilog in ASP.NET Core?

Accepted Answer

Serilog.AspNetCore

Answer

Serilog.AspNetCore integrates Serilog as the logging provider, replacing the default Microsoft logging pipeline.

ASP.NET Core Practice Test