CAT

You can go for self preparation. Along with that, you must join a good test series. Regular tests will help you evaluate your performance and work on the weaker topics. Just keep working hard and be determined. Keep notes of important formulas and short cuts.

Some of good coaching institutes in Bangalore are -
CET Tutorials, Career Launcher, Career Plan, IMS Learning centre
In Chennai-
Brilliant Tutorials, Magnus Institute, Ascent Education, Career Launcher. In Trivandrum-
TIME, IMS, Greens Educational Consultants Pvt. Ltd., Career Launcher.

Hi Madhu, It depends upon the cut-off FDDI sets for this year. If the cut-off is high, you getting in is difficult and if the cut-off is low and less number of people are above you who have applied your chances of getting it is high.

Yes, all B-Schools including Iims give weightage to CAT scores for first shortlist. After first shortlist, students go through What/PI and than final shortlisting is done. A good score in CAT do helps one to get into top-tier B-Schools of India. What-PI performance is also considered after CAT scores.

For Quant
Arun Sharma How to prepare for Quantitative Ability for CAT published by Tata McGraw Hill
Arun Sharma The Complete CAT Digest, by Tata McGraw-Hill
For Verbal
How to Prepare for the Verbal Ability and Reading Comprehension for the CAT by Arun Sharma and Meenakshi Upadhyay
Nishit Sinha The Pearson Guide to Verbal Ability and Logical Reasoning
For Data Reasoning
How to Prepare for Data Interpretation & Logical Reasoning for CAT (Tata McGraw-Hill) by Arun Sharma.

With 90 percentile in CAT you can target institutes like K. J. Somaiya, IIT-KGP/Roorkee/BHU, IMI-Delhi, TAPMI, FORE-Delhi, LBS-Delhi. IMT-Ghaziabad, XIM-Bhubaneswar. Mostly What-PI is conducted by institutes for shortlisted ones based on CAT scores. Institutes consider different aspects (diversity, work experience, personality) in PI.

Yes you can get into good B-Schools in India through CAT scores. No doubt you can get into Iims. Check the below link for hospitality management colleges accepting CAT scores-
https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/colleges/colleges-india?rf=filters&ts=45529599&ex[]=327&uaf[]=location
Also look at below link for Hospitality colleges accepting NCHMCT JEE scores-
https://www.google.co.in/amp/s/www.shiksha.com/hospitality-travel/hotel-hospitality-management/articles/amp/top-10-hotel-management-colleges-in-india-2016-blogId-10022.

Hi Akshat,
Yes, you are eligible to appear for CAT exam. You need to register yourself on the official website given below:
https://www.aicte-cmat.in/College/Index_New.aspx
All the best.