The recruiter rescheduled a phone call with me but never got back to me. I sent follow-up emails to see if something went wrong and tried to continue the conversation but there was no reply at all. I specifically took a day off for the rescheduled phone screening. However, it turned out to be unpleasant experience. Seems like the recruiter is unprofessional and showed little respect to candidates. Time wasted...

first phone interview with hiring manager, some Machine learning questions based on resume. like why validation, what is naive bayes, difference between k-means and k-medoids and how to choose K in k-means on-site interview with four employees, questions about basic SQL, python, stats and past project experience.