Uttarakhand

It is the best university in terms of placement but the university is too expensive.

Yes, DIT University is a recognised university, so yes you can go ahead.

Yes, why not. UPES, Dehradun is one of the good private college which has also top class facilities and top class teaching styles it has good placement records but fee is high. So, if you are not getting any other good college then you may go through this college for B.Tech.

You may refer to the following link for the ranking of IITs:
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-india/44-2-0-0-0

I would suggest not to concentrate more on the cheaper colleges. I agree, these days, the cost of education is very high. You cannot get affordable and best colleges together. The cheaper colleges are not good in terms of faculty campus and placements. The expensive ones are much better.
You can go for DU and JMI colleges in Delhi. They have comparatively lesser fee structure as compared to the private one.

Graphic Era, DIT, Uttaranchal Institute Of Technology, College of Engineering, Roorkee are some good colleges according to your rank and marks.

As I am a student of Dehradun campus, I find the place very peaceful. The college is situated in an area which is away from the city and provides the perfect conditions to have a complete learning experience. This campus helps you to develop new perspective about ones career and towards his life. This place has surely made a difference in my life. Just imagine yourself learning at the foothills of Himalaya.

Hello Ummul,
I understand and appreciate your interest in pursuing Bachelor of computer applications from Haridwar. To assist you in choosing the colleges to pursue the same, kindly refer to the link below for more information on the colleges:
https://www.shiksha.com/it-software/colleges/bca-colleges-haridwar
I hope this answers your question to your satisfaction. If so, kindly upvote this answer. If you have any further questions, kindly revert.