After clearing stage 1 aptitude based round there is a proper case study to solve in one hour time which is followed by Two rounds of interview. Case study required analytical approach which you have to discuss with the ZS leader one to one. After this case debriefing there is other one called FIT. FIT might be the key as candidates are generally more casual for this section .

interview was divided in a pool campus into three rounds basic andt then interview and then hr, it was ok, if you know your stuff like mistake finding, later gestimationa nd finally futre plans, good