To play the devil's advocate, and I am speaking specifically within the context of web development, what is a practical example of a linked list?
However... 2) Probably every list of objects you throw around in whatever abstraction providing framework you're using.
I think with web development a lot of the situations where you would want a linked list are abstracted away. Personally I would be testing people on how they take some kind of design outline and map out how they would approach it. Something like dealing with bringing together multiple API's to would be high on the list, this is becoming a much bigger part of web development.
Given a list of things, implement drag-and-drop way to reorder things.