Bangalore University

Hi,
It has been a very big gap now. Taking up regular classes after a gap seems difficult. Try for correspondence, but you will have to study 1st and 2nd year again. You cannot continue from the 2nd year.
Good luck.

Dear friend,
Amity University is a good private university. It has its own rules and regulations. So, if you are willing to pursue a degree course the Amity is definitely a good choice. You cannot get admission in Amity University to pursue B.Tech after completing a Diploma course as Amity doesn't offer lateral entry admissions.

You are eligible to seek admission in B.Tech in aeronautical engineering lateral entry at Manipal University based on your Diploma in mechanical engineering. You may refer to university website for admission details.

Dear Vishnu Vaishnav,
Bangalore University provides admission for MBA through PGCET. Therefore, prepare well and get the best rank in PGCET. You can secure admission in the same university.
All the best.

There are lot of b-schools in Bangalore and Pune.
Below mentioned are few names:
1. BIMM – Pune.
2. AIMS – Bangalore.
3. ISBR - Bangalore and Pune.
4. IIT.
5. Dayananda – Bangalore.

IBA is one of the B-schools available in Bangalore with pleasant placements with average salary package of around 4.5 lacs. In order to get into such B-schools, give entrance exams like MAT, CAT, CMAT, XAT, etc.

For internships you may check at the following links:
1. internshala.com
2. letsintern.com
You may also look for companies advertising locally in Bangalore.