Where did you learn German?
The sentence really depends on the context, but it translates to "When do you have German?" (informal).
Du hast keine Ahnung = You have no idea.
Hast Du Geschwister? means do you have any siblings?
In the sentence was hast du in meinem Zimmer there is a verb missing so it is hard to offer a complete/accurate translation:was hast du in meinem Zimmer getan? = what were you doing in my room?was hast du in meinem Zimmer gesucht? = what were you looking for in my room?was hast du in meinem Zimmer gesehen? = what did you see in my room?was hast du in meinem Zimmer vergessen? = what did you forget/leave behind in my room?
"Fuchs du hast die Gans gestohlen" "Fox you have stolen the goose"
I assume you mean "du hast mich", this is German, and means "you have me". I don't know how you say you have me in Italian, if that's what you meant.
Kannst du Deutsch sprechen = Can you speak German
Wann hast du Geburtstag = When is your birthday
Du hast was created on 1997-07-19.
It means " do you have a pencil"
Was hast du am Mittwoch = What do you have on WednesdayWas hast du am Mittwoch vor = what are you doing Wednesday
'Hast du ein Haustier' means 'Have you a pet?'