IIM Ahmedabad - Indian Institute of Management

You seem to be on the average side for an ST candidate. Given your performance, I would guess the range to be between 90 percentile to 97 percentile. To be on the safer side, you should aim for higher percentile 99.99. Please note that the cutoffs change every year and it is impossible to guess the cutoff. Hence put in your best foot forward.

Every has its own importance and scope. Your skills and academic performance can help you get good job with a good salary.
All the best

you need to score around 99 to 100 percentile on CAT.

No, you will not get any exemption from CAT. For all candidates aspiring to be join IIM, CAT is a must.

To get into MBA course you will need to appear for the entrance exam. You can appear for it this year and then apply to different colleges. Unfortunately there is no other way to get into business schools in India(atleast for a fresher).

Chances are high, but you shall be needing a good GDPI score and keep your graduation average score at above 75%. High cgances of converting IIMs, but you should be well versed with current affairs and management knowledge.

Great determination and Self Belief. You shall join classes like TIME,CPLC, IMS, CATKING. Put 10hours a day daily and give basic mock exams for weekends. After 6months you may start giving full fledged mock test on entire syllabus, and rectify your mistakes and focus on your weaknesses. Cheers.

No You can't. Unless you have completed your undergrad with minimum 50% marks, you can not appear for CAT and hence you can not join PGDM course. For your CAT score to be valid, you need either your degree and marksheet or a letter from the dean of your college saying that you have completed all the courses and the degree will be awarded to you soon.

Eligibility-
Candidate must have a Bachelor's Degree, with at least 50% (45% in case of SC/ST/DA category) marks or equivalent CGPA
Must have appeared in CAT/GMAT and obtain qualifying score
Admission Procedure-
Admissions are done on the basis of score in CAT/GMAT and Academic Writing Test followed by personal interview
Only top 50 candidates or top 1% of the applicants will be shortlisted for AWT and PI on the basis of there CAT percentile
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653