There is no concession for SC/ST students in IIM A, B and C. But this is not a major issue.

IIMs offer a lot of financial aid services to financially weak people. In some cases, the entire fee is paid by the college or some part. It depends on the judgment of the panel on the basis of your situation.

All IIMs offer educational loans at a relatively low interest rate. Banks usually consider IIM students as a profitable investment. So rather than worrying about the money, focus more on your goals.

Yes, it is possible to reschedule an interview at IIM Bangalore, IIM Calcutta or any other IIM. If you can’t attend the interview, for some reason, you can write a mail and request them to give you another interview slot. You should explain the reason and attach proof with the mail. For example, if your semester examination dates are clashing with the interview date, you should attach the examination schedule with the mail. 

For valid reasons, they agree to reschedule. 

One of my friends had the absolute delight to appear for the PGDBA interview conducted by a multifaceted panel. He shared his interview experience which might help you a bit.

Before the interview began, he was taken for a Verification Round wherein, every detail of academics scores or other profile-related information was cross-checked on the IIMs format. Once they received an IIM-verified document they were escorted to the interview venue.

The interview room had 3 panels; one from each institute obviously.

They asked for his brief introduction first. On hearing about his interest in Data Analytics, panelists probed him further with questions like

• What is Data Analytics
• Difference between analytics and analysis
• Contemporary Data analytics and ML

They further asked him why he chose Analytics. He told them that the increasing demand for the same in Europe and China made him realize how much India lacks in this aspect and thus he wanted to invest his efforts in Data Analytics.

Next, he was tested on his knowledge of Statistics and Mathematics with questions like 

• Difference between mean, mode, Media
• Skewness
• Relationship of mean, mode, and median in a positive Skew graph
• Hypothesis Testing
• What is Anova

The next panelist took the reins and gave him a problem from SPC quality control. He asked him how do you know that his process in electric bulb making is as per customer Norma and is statistically controlled. My friend was able to answer most of the questions confidently and even solved this problem through charts. 

Lastly, he was asked about his extracurricular activities and hobbies. The discussion ended with him asking about GST and the difference between GST and previous tax. Even though he gave a common answer, he managed to convert the interview.