What is the `res/` directory and how do you use resource qualifiers?

This tests your understanding of Android's resource management, which decouples static assets from application logic. A strong answer first defines `res/` as the home for non-code assets (layouts, strings, drawables). Then, explain how configuration qualifiers, like creating a `layout-land/` directory, allow the system to automatically select the correct resource at runtime based on device state. A common red flag is programmatically checking orientation in code, which bypasses this powerful and efficient framework feature.