Got a call from HR for a technical F2F scheduled on a date. But no confirmation was sent. I called two days before the iview to confirm on the slot. HR was sorry about not scheduling the iview and finally rescheduled it to a week later. First one was a general discussion about projects. it was good. Later part of the discussion, an architecture specific question and a puzzle was given. I did farily well on the first question. But I couldn't crack the puzzle. In the end, I was asked to wait and told that I didn't clear the iview. I was happy though with the result as it was not self-satisfactory. After I came home, I searched for the puzzle and found that the interviewere didn't give a complete question to me. He had missed the most important assumption / point of the puzzle. I am very sure that I would have answered the puzzle if he had mentioned that assumption as I was thinking in those lines. A good experience overall.