I was interviewed by a technical person who works in my area of interest. After some basic information emails, I was appointed for an interview on a Thursday.

They used some web coding pages, and I joined the chat. The interviewer showed me a coding problem. The problem was about trees. I didn't have much experience with trees, so I asked him to change it for some other questions.

Finally, I got an array question, but I didn't answer it wisely. Thus, I received the rejection just the next day. Their response time was really short.

Given a sorted array, find the emergence of a given number.