i want to do M.B.A. from IIMA. now i am doing Engineering (2nd year) ,will i eligible for the C.A.T?

well you are pretty much eligible for CAT/MAT.... Being an engineering student, i would like to advise you that try to make career in Core Sectors.... MBA in core sectors are in huge demands these days... Completing them from prestigious university like UPES Dehradun will give you an extra advantag

no after or when yu are in final year then you can give CAT exam

Well you can appear for CAT in final year. But overall you need to have a minimum of 50 percent in graduation. eligibility for IIMAs PGP course is Eligibility The candidate must hold a Bachelors Degree, with at least 50% marks or equivalent CGPA (in case of the candidates belonging to Scheduled