No, ragging does not happen in the Dibrugarh University hostel. Students refrain from making the freshers feel uncomfortable, instead, they are supportive.
The academic pressure is too high for students at the university to engage in any such ragging activities on others. However, there have been instances of students getting debarred due to serious ragging activities in some particular hostels.
If you focus on your studies and stay away from any mishappenings at the college you would be able to stay away from the troublemakers.
Even if you face any problem in the hostel premises, then you can freely consult the prefect or the warden.