Micron Technology Process Engineer interview questions

Micron Singapore. First interview with HR managers, and second interview with director. HR and directors are so demanding, asking many times about commitment, asking to explain very detail process which might credentials for company, so need to review some scientific publication papers. On the second interview, director asked for another interview the next week and prepare some other presentations about technical machinery, but never heard back about the schedule nor the outcome of the interview process. Already asked HR about the schedule for the next interview asked by director, but nobody response. This ghosting experience gets annoying because a lot of efforts had been put to make all difficult presentations and the pressure during the interview also make it worst.

Applied online. Phone screen followed by a panel interview a week ago. Position is entry level (new college grad). No contact after 3 weeks, presumed not selected for the position.