Azure App Service & Web Apps Flashcards

Which runtime identifier is used when deploying a .NET 8 isolated Azure Function in App Service?

Answer: dotnet-isolated

The dotnet-isolated worker model runs .NET Functions in a separate process and requires specifying the dotnet-isolated runtime.

What is the App Service Managed Certificate used for?

Answer: Providing a free TLS certificate for custom domains

App Service Managed Certificates provide free, auto-renewing TLS certificates for custom domains hosted in Azure App Service.

How do you enable health check monitoring so App Service removes unhealthy instances from the load balancer?

Answer: Set a Health Check path in App Service configuration

The Health Check feature in App Service pings a specified path and removes instances that return non-2xx responses from the load balancer rotation.

What kind of storage does the Azure App Service file system provide, and what is its main limitation?

Answer: Ephemeral local storage that is lost on restarts for apps without persistent storage configured

The App Service local file system is ephemeral for free/shared tiers and is shared Azure Files storage for Standard+, meaning local writes may not persist across instances.

Which App Service diagnostic feature captures slow requests and request traces to help identify performance bottlenecks?

Answer: Failed Request Tracing (FREB) and Slow Request logs

Failed Request Tracing (FREB) and slow request logs capture detailed traces of requests that exceed a defined duration threshold.

Which App Service configuration option allows you to pin a web app to a specific .NET runtime version?

Answer: The stack settings (General settings → Stack) in the portal

The stack settings in the App Service General configuration allow you to select the language runtime and its version for the web app.