I had one 20-minute conversation with HR business partner and it was a very unpleasant one. She had a condescending tone with me and after each answer about my experience or their company she argued and claimed that I don't see the situation that way. As a professional with 10 years of experience I am very confident that I have enough understanding and HR specialist is unlikely to know more about project management than me. What is most surprising is that I have never heard back from them, not even to my follow up email. Unprofessional.

Checking overall product acumen, past experience, technical skills, business skills etc. It was a multi stage interview first with product managers, then with Product Directors and finally with the VP of Product. At each level the questions became more business focussed than technical focused. You need to be very clear about your product management fundamentals.