Amazon Software Engineer Senior interview questions

The very first interview was with a senior engineer (no screening, no job explanation, etc). He didn’t give me introductions about himself and couldn’t explain me anything about position, saying that he doesn’t even know that it exist... First 30 minutes were random behavior questions and every time in the end he was asking to give concrete example on what did you do in that particular case. I felt that he didn’t listen to me. Last half an hour was a simple coding task with an additional question on adding another small feature. There were no questions or comments on the code except 1 small syntax error. The coding task was to find number of words separated by a space.