It was around 15 min , overall what ever you say they will ask questions connecting to that , and in addition to that there was a extempore round also. difficulty of questions were avg but the selected only 3 students from civil so with that respect , we can say the interview as difficult.

They asked me questions pertaining to my family background, my branch (1 subject which i carefully asked for- 2 questions each by the 2 interviewers) Someone made a mistake by telling them a subject which he had no clue abt, since they started on a very open ended note that we have to tell them the subjects we studied Finally, they give an extempore topic like smart city and all