Computers & IT (Non-Engg)

I would suggest doing B.Sc. As nowadays, IIMs do not prefer B.Tech or BE degree holders.
Even there might be a discrimination against you during the interview due to an engineering background, but it's okay if you want to make your career in the IT field, all you need to do is have some work experience. Else, I would suggest you one more thing, if you are capable of doing your graduation from Germany then you will have a chance to get the job in Germany after graduation. If you want to stay in India go through B.Sc and meanwhile prepare for CAT as well.

You can learn languages like Python, C, Java, and Scala, that are used for designing.

No, it is not necessary. You start a new career after 12th class in a new field.

There are over 19 BCA colleges in Chandigarh. Please refer to the link provided below for a detailed list of these colleges. You should be able to navigate to the top colleges in this list using the filters on the web page.
Regards.
https://www.shiksha.com/it-software/colleges/bca-colleges-chandigarh

Top 10 current technology trends for IT enthusiasts is mentioned at the link provided below. Kindly visit the link mentioned below:
https://www.shiksha.com/it-software/databases/articles/top-10-current-tech-trends-for-it-enthusiasts-blogId-5643

Please refer to the link provided below for details regarding eligibility and admission criteria to secure a seat in Post Graduate Diploma in Management at Indus Business School, IIEBM, Wakad, Pune.
https://www.shiksha.com/mba/course/post-graduate-diploma-in-management-indus-business-school-iiebm-wakad-pune-128617

Hi Ahmed,
You can choose DCSE/DIT for fulfilling your aspiration.
All the best for your future.

Hello Simran,
It's indeed very heartening to see that you have already set a goal for yourself. Half the battle is won. But, normally, for admission to Ph.D, the basic eligibility is to have PG in this subject. Of course, there are some institutions which give admission to integrated PG+Ph.D course. TIFR is one such. But you need to find out if it is offering subject of your choice.

Yes, Aarupadai Veedu Institute of Technology - AVIT
Aliah University - AU
Amal Jyothi College of Engineering
Amity Institute of Information Technology
Annex College of Management Studies