MAT

Yes, she is. Cut-off differs from college to college.

It differs from college to college e.g. for JBIMS, cut-off is 99 percentile and it's comparatively low for Great Lakes.

No, it doesn't accept MAT scores. It accept CAT, CMAT, GMAT, and XAT scores.

Yes, The eligibility is such that Candidate must hold a Bachelor's degree with Full-time graduation courses in any discipline recognised by the UGC/AIU
Consistent academic record of not less than 50% marks or equivalent CGPA in 10th standard, 12th standard and degree is required
Candidates appearing for the final year of Bachelor's degree/equivalent qualification examination in the year 2019, can also apply. All candidates are required to take at least one of the entrance exams CAT/ XAT/GMAT/CMAT/ NMAT or who already have valid CAT/XAT/GMAT/CMAT/NMAT scores.

IIM (Bangalore) is one of the top management B-schools that every student aspires to get in. Generally IIMs take cut-off of 98-99+ in CAT, so do well in exam (CAT). All the best.

Yes, PUMBA accepts MAT score for admission in this course.

HI!
For MAT you can refer- https://www.shiksha.com/mba/articles/mat-exam-centres-blogId-19759
For ATMA you can refer-https://www.shiksha.com/mba/articles/atma-2018-admit-card-test-centres-blogId-14971.

Yes, the placements in GBS are good every year and this year around 100 students got placed within 45 days with an average package of 5 lacs per annum. All the students got placed in good and reputed companies like Amazon, Nestle, Dabur, Asian Paints, Berger Paints, TATA Motors, Axis, ICICI, Bajaj Corp., Aditya Birla Groups, Future Groups, Reliance Trends, etc.

BIMM Pune is a good B-school. You can definitely consider this option as ROI and placement records are great here. Best colleges where you can apply:
1. BIMM
2. ISBM
3. DY Patil
4. ISBS etc.