Dear Ritu!

Yes, you can take admission in b.tech and b.arch college offline.Most of the private colleges are providing admission in offline form. You are required to visit these colleges personally and satisfy their eligibility criteria to take admission. However , if you are targeting a good government college, then you should appear for competitive exam like jee mains and JEE advanced, comedk , bitstat, etc. As per your course.

Hope this will help you.