Hey Aishwarya, 

Thanks for contacting us.

B.Tech in Computer Science is basically a 4 year undergraduate  engineering course.Regarding in your question of preferred colleges it totally depends upon your choice of studying and other factors too. If you want to study from Bangalore there will be number of colleges offering B.Tech in CSE,along with the best placements and faculty.Private colleges also have their own facilities.

Banasthali University is also a good choice for studying B.Tech CSE.You get full wifi campus and hostel facilities too. The university is approved by AICTE.The placements vary for every academic year.The average package is around 3-4 lacs.Many students get the best placements while some are not placed also

Now it totally depends upon you.Also the life style of Bangalore and Rajasthan also has differences and perks of its own! 

Thank you.