hello aspirant,

tiss net exam stand for tata institute  of socil sciences and research national entrance test. the basic eligibility criteria is students need to have bachelor degree in any discipline in 10+20+3 or 10+2+4 or in 10+2+2+1 pattern. however as you have already passed an mba degree you may also apply in this course. as there is no limitation for pursuing masters courses. one can have 2 different subjects mba degree. hope it would help.