Schengen visa query

Hello Members,

I have received a visa valid from 03-08-24 to 11-08-24. I am planning to exit in the evening around 04:00 PM on the last day. Would that be acceptable?

Additionally, in my itinerary, I mentioned that I am only visiting Germany. Is it permissible to visit other Schengen states as long as my entry and exit are through a German airport?

In my itinerary I showed dummy pay later bookings but I’m going to stay with a friend, If asked at entry to justify max number of days, how can I do that ?

Duration of stay: 9 days Number of entries: single

Please advise. Thank you 🙏🏼