The one who interviewed me act as if he is really professional, mighty senior (maybe he is)
but at the end of interview...he asked if I have any questions...I asked about the main projects or objectives they are trying to receive now or in the near future... He talked about how many departments and what they do =.=" These are already described and can be found at internet... I am not sure if he was trying to keep their projects as a secret or he don't understand my questions.

Perhaps they should not act arrogant towards interviewee.. Hilti gave me the worst impression among all the interviews I have attended. Nevertheless, this was just my experience..