Think I already know the answer for this, but just in case.
I have an existing point and a line feature hosted service. I plan to create a survey to edit just the attributes of these services.
1. A single survey can only have one geometry type i.e. point or line? Not both.
2. Is it is possible to have the line feature hosted service as a reference layer on the basemap?
I suspect the answer is yes for question 1 and no for question 2.