After taking exams like CAT, GMAT and MICAT, which is MICA's own entrance exam, you are shortlisted for GE/PI based on your combined CAT/GMAT and MICAT score. Every candidate's interview experience is unique and subjective. The panelists try to ask critical questions, eager to test your stand. But you don't need to stress out, just be rational. 

Here is a genuine interview experience of a friend of mine:

Venue: Indian Social Institute, New Delhi

Slot: Morning Slot

1. First of all your GEPI Registrations happen at the venue which eventually gets over by 9:15 after which you are assigned panel numbers. Candidates are put into several groups of 7-8 members each, and from there they are taken for the GE.
2. Thereafter, two-panel members welcome you and provide you with aprons to wear, on which a serial number of candidates is written.
3. A group exercise is assigned which has to be executed collectively by the group members at the GE. The exercise that my friend got was "to prepare a skit in which you're playing yourself and Candidate 3 is chosen for admission to MICA from this group, you have to justify his selection."
4. Then, you are given 7-8 minutes to think about and plan your group exercise. My friend and her group decided that they will let candidate 3 have a great interview while other group members will be downplaying their strengths and hence justifying the selection of candidate 3 through their group exercise.
5. After your group exercise, you are asked to wait for the common waiting area and you will be facing three new panel members for the personal interview round. 
6. The panel members will greet you and ask you to sit down. They might discuss the group project that you just performed and what was your role in it. 
7. They might ask you about your academic background and why you chose to appear for MICA over IIMs. Questions about social media marketing, digital marketing can be thrown at you at any time so prepare beforehand.

Lastly, even if the panelists try to grill you, you have to stand your ground and keep your composure. If you have good communication skills and you understand what all marketing is actually about, then your result will be definitely converted.