The event survey may contain multiple questions and supports 5 different question types:
single choice (optionally with an "other" option for attendees to answer)
multiple choice (optionally with an "other" option for attendees to answer)
It is considered that an attendee has completed the survey if all questions are answered or if the survey is submitted. Answering only a few questions means the survey is partially completed.
Session ratings in the survey are the same as in the detail page for an agenda item. Attendee tracks are taken into account when displaying session ratings.