Ness Digital Engineering interview questions

They have made me wait for 4 hours for a scheduled interview and at the end the interview lasted 10 mins. It was clearly visible that interviewer was just doing formality by asking basic questions. I have seen the contact person making few candidates attend the interview as soon as they visited the premises, may be they came through referral. And for other candidates they just keep repeating more 30 mins/1 hour. At the end I felt, I wasted my precious 4-5 hours.