Khoros Software Developer interview questions

So first round was general apty,which was super easy.Next round was technical interview,I felt like I answered almost everything except for the last one correctly,but I wasnt selected for the next step which was kinda not fair because others who were asked simple array questions were taken in,whereas i was asked in-depth and just not answering 1 question put me out

Didn't even acknowledge that I had another appointment at that time. I had to miss this interview. When asked for an exception, received absolute negative response. Could have been a little more sensitive.