Karnataka

You can refer to the following link for ranking of engineering colleges in Bangalore which offer B.Tech CSE:
https://www.shiksha.com/top-computer-science-engineering-colleges-in-bangalore-rankingpage-46-0-0-278-0

Below mentioned are some of the good colleges for management quota:
1. Christ.
2. Acharya.
3. XIME.
4. MS Ramaiah.

If it is a full time course, you can get a decent placement. If you are doing it through part time, it will add knowledge and polish you in terms of presentation skills and team work. For job prospects, you won't get any benefit as part time MBAs do not have any placement support.

In my view, Delhi is better for MBA as there are a wide variety of organizations in and around Delhi. Students can easily get exposure to various fields of interest. Also, if you look at stats, the average package of MBA colleges of Delhi is more than other cities.

Hi,
Manipal is a good option but you may also try for IGNOU.

EPGM certificate from IIM Bangalore is a better option because you will get certification from a top B-School of India. Certification brand image matters the most in the field of management education.