Nielsen Research Analyst interview questions

Interview process has multiple stages Couple of technical rounds then HR interview Technical rounds may have stat, Case study prstn, language proficiency questions.

Applied online, was asked for a phone interview to which I replied with available times and received no response. I followed up within the time frame in case the email was lost or something but still nothing. Very odd and unprofessional. It seems that if there were too many responses an email is an easy thing to send these days.