Reva University

Yes, if you have qualified 10+2 entry level of education you can join B.A.

Yes, this university is a very good university I wanted to apply for it and I applied for it earlier but now I am at UPES. This is a great university with great labs and with great opportunities that you will be getting when you will enjoy the life being there.
my friends are there and they are having their best time.
It is a quite expensive university but the amount of exposure and the number of skills that you will learn and earn is worth paying for.

You can go through the link which is mentioned below.https://www.shiksha.com/science/course/b-sc-in-bioinformatics-biology-computer-science-and-mathematics-reva-university-yelahanaka-bangalore-306139

No, there is no free admission on JEE basis. You may get concession in managment fees in REVA University.

Reva University is good for BBA with experienced faculty members and fees would be 70-90k p. a.

NAAC accreditation is an optional rating thing. They give accreditation as A, B, C etc. Its not compulsory. What is compulsory is AICTE permission and UGC.
So, check for these two. You can go for it.

REVA University is a private university and have MOUs with many foreign universities. It's upcoming best university in India. Visit both the colleges and choose the best.
All the best.

Salary will vary to the company. Kindly contact placement cell of REVA University and get full information about placements.