ASP.NET Core Configuration & Logging

Question 1

Which file is the primary configuration source in an ASP.NET Core application?

Accepted Answer

appsettings.json

Answer

appsettings.json is the default configuration file read by the ASP.NET Core host, with environment-specific overrides supported.

Question 2

What is the correct order for configuration providers in the default ASP.NET Core host?

Accepted Answer

appsettings.json → appsettings.{env}.json → environment variables → command-line

Answer

Later providers override earlier ones, so environment variables and command-line arguments override JSON file values by default.

Question 3

How do you access a nested configuration value 'Database:ConnectionString' in ASP.NET Core?

Accepted Answer

configuration["Database:ConnectionString"]

Answer

Hierarchical configuration keys use colon (:) as the separator when accessed via the IConfiguration indexer.

Question 4

What is the purpose of the IOptions<T> interface in ASP.NET Core?

Accepted Answer

To inject strongly typed configuration settings bound to a class

Answer

IOptions provides a bound, typed settings object injected into services, configured via services.Configure().

Question 5

Which method binds a configuration section to a C# class in ASP.NET Core?

Accepted Answer

services.Configure<TOptions>(configuration.GetSection("Section"))

Answer

services.Configure<T>() with GetSection() registers the options class and binds configuration values to its properties.

ASP.NET Core Practice Test