How difficult is it to change branches in NIT Patna from mechanical to CSE?

It certainly is difficult to change branches in NIT Patna from Mechanical to CSE. The change of branch allotted by JoSSA in NIT Patna is done after two semesters. As per the policies,

• Students of B.Tech. or Integrated M.Sc. can change their branch to any other branch of their choice.
• Students of B.Arch. are not allowed to change their branches because their admission was done on the basis of Paper - II of JEE (Mains), not Paper - I.
• The total strength of a particular branch cannot exceed 110% of the original strength 
• The total strength of a particular branch cannot be dropped beyond 90%. 

Basically, there can only be an increase of 10% in the strength of a particular branch.

To be eligible for branch change students have to complete the following criteria 

• The students must have completed all credits of the first two semesters in their first attempt.
• The student must have scored a CGPA not less than 8.25 in the first year.

The criteria appear to be quite simple but the reality is changing the branch to CSE is a bit tricky and challenging. The seats usually vanish up to 9 CGPA for CSE, because the competition is tough for this particular branch.

So, opt for branch change only if you are genuinely interested in the branch you want to get into.