UGAT exam is conducted by All India Management Association (AIMA) for admissions into B-Schools.
You can get the previous papers of UGAT exam by searching on Google.
Search for " UGAT previous year papers" and there are various third party sites that have these papers in PDF format at free of cost. (Download option is also available).
To know more about UGAT 2020, you can follow the link given below:
Hope this helps.