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.

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...