Cognizant Jr. Software Engineer interview questions

OnCampus Interview, There was no proper managment on the interview day. They just call everybody and the start choosing from genc next categerory and started choosing randomly. We were sitting meaninglessly the entire day. Even on the second day, my document verification was already done in the morning at 10 am. But by the time my turn came it was already 6 pm. Both me and the interviewer was exhausted. He barely asked me any question and it was already done. Like in 15 minutes. I think it was already late so he was trying to wrap up fast who doesnt seem promising. Whereas some of my friends had an interview for over 2 hours. We were having an video call with interviewer while the interviewer was present on site. It has something to do for recording and checking if interview is completed or not so that they can send the next student.