As far as the interview is concerned the questions that you’d encounter would range from…
Tell us about yourself
What was your favourite subject in school
Some questions from the favourite subject you mentioned
Why do you wanna join Christ for BBA FIB
Might ask you current affairs
Basically, you have to talk, talk and talk. Show them you are a good speaker and make sure your answers are different than the basic one however the 10th and 12th board marks also play a significant role in the questions at interview. They might also ask you with reference to your the marks scored. For example they might see through your mark sheet and see where you scored less and they ll ask you the reason for the same. Have valid answers to everything.