How would you solve an interview scenario involving configuration and options pattern?

For a practical scenario involving configuration and options pattern, I would first clarify the business goal, scale, constraints, and the failure or quality attribute being tested. ASP.NET Core combines configuration providers such as JSON files, environment variables, command-line values, and secret stores. The options pattern binds configuration sections to strongly typed classes. The scenario centers on for a singleton service that must react to configuration changes, inject IOptionsMonitor<T> and read CurrentValue or subscribe to OnChange. I would then compare the main alternatives and tradeoffs, identify likely failure modes, and explain how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.