Applied online. HR contacted me for the first round of interview. Her way of communicating was not professional, she didn't even respond to the questions I emailed her. The first round was easy. Asked me to go over experience and skills. Then, basic questions about precision, recall, accuracy, NLP etc. Immediately got an email from the HR to come for the interview. I told her the date I would be able to go. She scheduled the interview. After a day, she emailed me and said that the interview is postponed due to unavailability of one person. I said her okay and told her the new date. After that, there is no response from her. I even emailed her after a week, no response!. Such an unprofessional HR. She could have told me whatever the hell the reason was.