B.Tech Computer Science and Engineering

Saumitr, it is a good institution but what you need to check is what type of placements it is offering,what type of companies are visiting for recruitment purpose.
Check some other private institutions to which these days are a hot spot for good companies for recruitment purpose.

You should check the list of government colleges in brochure, than see last year's cutoff of that college.

All are best for CSE but you have to pay more to learn more

It is not mandatory to have computer as subject in 11 & 12th for doing BTech CSE. But I will advice you to learn at least C++ programming before you join BTech CS, this skill will come quite handy to you.

Go with Informatica

IT in SRM vs CSE or petroleum in UPES
If you can go for upes because it's a good college for petroleum and cse it's has good infrastructure and good placement and the beauty of dehradoon but it's expensive as compared to srm and IT has less placement then CSE so go for cse in upes

For more details contact 9538874444/5

BTech IT will have more subjects on Hardware in comparison to BTech CS. As you want to make career in Hardware you may chose BTech IT or B Tech CS.