Facebook Enterprise engineer interview

I believe I did well in both coding rounds. In system design, i was asked to design a service architecture. I could've told at least 1-2 more APIs than what I told. However, I covered db schema etc. In the manager round, I was asked a coding question in last 15 min of interview, which I think I screwed up. Are there any chances of positive response? yoe: 5 years, tc: 220k