Tangoe Software Test Engineer interview questions

Got a call from consultancy, 2 technical rounds, It was very much frustrating, it was like walk ins more than 150 candidates were present but very less Interviewers, scheduled at 10.30 but made us wait for 4 hours, finally at 3.00 O clock HR came and asked to face the interview, it went very well, I could answer all most of the questions. He asked me to wait and HR came and said with famous irritating word 'Leave for the day'. They are just doing Time pass there, not really concerned about candidates time. Think before you go for interview there. Even the HR there are not much responsible and they don't have even courtesy to ask excuse for making candidates wait for such a long period. In fact I was intended to go for this company interview as I had some personnel work, but because consultancy lady said they have a good requirement and its not like Weekend drive, then only I went there. Wasted full day of mine which I could have utilized for some quality work.