MBA Entrance Exam

Since,You have one year remaining with you, if you want to prepare for CAT side by side BTech, You can opt for two things, Either take CAT coachings, if you can't do that now, then start reading about Current affairs and General Knowledge, preferable books, Manorama Yearbook, Pratiyogita Darpan, Competition Success, Front line Magazine, India Today.

You can join coaching institute like TIME, Career Launcher, IMS etc. There are various books by Author Arun Sharma which will be of great help for entrance.

Danish, you can try for some private universities. Not all of them take admission through CAT/MAT/ XAT/ CMAT/GMAT etc only. There are many like Lovely, Chitkara, Sharda, etc that offer admission either on marks of graduation or their own tests.
All these are world class universities with good placements. Some even offer scholarships.
Check with the universities for more information.
Good luck.

You Should have a proper explanation for the gap.
In interview for good B-Schools they may ask you about gap, so be prepared with good and satisfactory answer.

Hi,
Check the complete details related to the college in the link provided:
https://www.shiksha.com/college/indian-institute-of-social-welfare-and-business-management-college-square-kolkata-166

Brilliant faculty members and excellent environment for all Cat aspirants Best among all institutes in Jaipur. so you can join the coaching for good result.