Uber Machine Learning Engineer interview questions

Applied online. HR contacted with basic screening questions related to visa, location and availability. The recruiter then scheduled a coding round video interview with a senior engineer via code signal.

First had a CodeSignal test sent, after clearing that the recruiter scheduled an on-site interview, for which the interviewer never showed up. After emailing them multiple times to reschedule, they finally rescheduled but the interview was entirely different from the interview invite. The invite said it was a 30 min machine learning interview with the manager, but the actual interview was an hour long programming interview with a different engineer who asked me to implement k-means algorithm in less than 30 mins. The interviewer sounded like she had already made up her mind to not go ahead in the first 5 minutes of the interview as she kept telling me my answers were wrong before I even completed 25% of it. Got a rejection email a day later.