UGAT is Under Graduate Aptitude Test. It is conducted by AIMA for the courses like
BBA
BCA
BHM
Integrated MBA (IMBA) and others
The online registration for UGAT has not been started yet (as on 17th Dec, 2015).
To apply online you can follow below steps
Go to AIMA website.
Then place cursor on testing services and click on UGAT, the page open look like





Here you will find the information regarding the UGAT online registration.
You will find the link to UGAT application form when the registration portal for UGAT will open.

Eligibility:
Candidate should have passed 10+2 or equivalent from a recognized board.
Students appearing / appeared in 12th can also apply.

Exam Date 07 May 2016 (Saturday)
Reporting Time for the Test 0900 Hrs
Last Date for applying online 27 April 2016 (Wednesday)
Last Date of receipt of printout of UGAT
Online Registration Forms at AIMA,
New Delhi alongwith Demand Draft of Rs.500/- 29 April 2016 (Friday)

The registration link will be available from January, 2016