Will you provide the bubble sort algorithm if asked? The first comment on this post also says they ask search questions as a FizzBuzz filter, but unless you will provide the algorithm then you're also asking it as an algorithms question.
Bubble sort always seemed odd to me, and since I can remember insertion sort, if I ever found myself in the odd position of having to write a sort for a program without any reference materials, I'd just use insertion instead.
It probably depends on the position. As a high-level language developer I don't usually implement my own sorting algorithms. Either I use prebuilt libraries that offload work to low-level, or I use builtins, or I ask the database to sort it for me :)