I just went through this process in Netherlands -- thanks for all the info! They are mostly questions that anyone who knows enough about Switzerland to seriously be integrated should know the answer to (like name 3 grocery store chains, 3 rivers, 3 lakes, very generic description of government & cantons), but it's nice to have some idea in advance of the exact questions -- which are nearly or exacctly the same today as they were when OP made this post.
I had the same questions plus one more I didn't see here:
ā¢Name 3 Swiss watch brands
Then
ā¢For the name sports / name instruments, this I found very hard -- as the Alpenhorn and Schwingen/Lutte are pretty much the only famous ones. My wife and I had never even heard of Hornuss (we mostly lived in Suisse Romande - 12 years in CH for me overall). I'm not sure if he gave me credit for saying "Alpenhorn and uh... yodel??" instead of Schweizerorgeli.
And also for the heimatsort / lieu d'origine, you also have to describe the flag of that canton. I did not know the flag of St Gallen, a canton which my wife's great-grandfather lived in, and no one in her family has lived in since like 1930. The heimatsort system is kind of glad, but lucky for her great-grandfather, because otherwise he has only had female descendants at the current generation (across like 8 cousins & 2nd cousins, so quite a male:female ratio in that family tree!), so I will be the only one in his line to carry on the heimatsort of his tiny village in St Gallen...
The guy interviewing us I think also had a bit of fun with it, asking some extra questions that I don't think were actually part of the exam, like what is the special ingredient in Rivella (milk serum).
There was also a question "are you and your spouse more than 15 years apart in age" which was not the case for us, but it also went along with the questions like is one of you a drug dealer or a prostitute, etc, that have been mentioned before. I don't remember the 15 year difference being mentioned in the other threads about citizenship interviews abroad.
Apparently they do about 10 facilitated naturalizations per year for all of Benelux (all in The Hague), so it seems to be a surprisingly unusual occurrence!
Our interview was all in French (I have C1 level), but he welcomed me and we chatted a few minutes in English (my native language) and we talked a little bit in German (me) and Swiss German (him) just to get some idea of my language skills. I don't think it would have mattered if I exclusively spoke in French, but it was good to show my mediocre-conversational German (middle-B1) since I had lived on both sides of the RoĢstrigraben.
He also said that in 3 years of doing the process in Benelux, he had never seen someone not get citizenship after advancing to the interview stage - although some people don't get that far if they don't meet the initial criteria check.
The interview was about 75 minutes, plus maybe 15 minutes of just regular chatting before and after. He said the interview was unusually fast, since I knew the answers extremely well - but most applicants either haven't lived in Switzerland at all, or haven't lived there very long. The only thing I actually had to study was the 7 national council members, and what department they were directing.
Edit: Also there was no written part. The 15 minutes before the oral questionnaire also included maybe 5-7 minutes of him flipping through my printed application -- the one I had sent in duplicate by mail several weeks ago -- to make sure it had all the necessary documents.