it is better to give UGAT exam just after 12th passout or i should give 1 year preparation time to score good in this.
All India Management Association (AIMA) conducs the Under Graduate Aptitude Test (UGAT) for admission to various management programa like BBA, BHM, B.Com, etc.
If you feel that you are fully prepared with important sections of this test like numerical and data analysis, reasoning and intelligence, general knowledge and so on than you should not waste your precious year.
You should appear for this exam once after 12th and if you did not score good marks you should prepare yourself for next year.
For more details about UGAT 2020 you should read this article .
I hope this answer helps you.