Can I change my branch after the first year?

I recently joined college, but I'm not completely satisfied with the branch I got. I wanted to know if it's possible to change my branch after the first year.

• Is branch change allowed in private and government colleges?
• What are the eligibility criteria (CGPA, vacancies, etc.)?
• Can I switch from Civil or Mechanical to CSE or AI & Data Science?
• Does changing the branch affect my graduation or placement opportunities?

If anyone has changed their branch or knows the process, please share your experience. It would really help me and other students.