Intivia interview questions

I was reached before 5 mins and impressed with the building. but my impression broken in next half an hour when there was no body to attend me, neither office boy nor receptionist nor HR. I have not been offered a glass of water even. Without AC or fan, i was sweating like anything. After half an hour HR lady came and took me inside. After formal intro, she handed over me to technical person, whose knowledge was good and asked me questions good number of questions