You use Azure Front Door to serve an ASP.NET Core site that provides CSV data files refreshed every 10 hours. You must purge specific files from the Front Door cache based on Response Header values. Which purge type should you use to remove individual assets?

The correct answer is single path. When you need to remove individual assets from the Front Door cache, a single path purge allows you to specify the exact URL of the file(s) to be removed. This is precise and efficient for targeted cache invalidation. Wildcard purges are used when you need to remove multiple assets that share a common pattern (e.g., all files in a specific directory or all files with a certain extension). While useful for broader invalidation, it's not the most precise method for individual assets. Root domain purges remove all cached content associated with the specified root domain. This is a very broad operation and would be overkill for removing specific files, potentially leading to unnecessary cache misses for other content.