As per the AAI ATC JE examination notification, the eligibility suggests that the student need to have Mathematics and Physics as one of the subjects in graduation. Now its always expected from a student, that he/she must have the subject at least in two years of the UG course. As you have only semester, it may not cause any problem because in the official notification there are no mention of the years of study of the subject. Apart from this the student need to have 60% atleast in the UG course.

I hope this helps. Wish you a great eve!