Fab.com Engineer interview questions

Applied through employee referral.Got the call.first it was telephonic interview which include question on tree basics,sorting and string.Aftér this round call for onsite f2f.HR discussed about why u want to join fab,about fab and explained me about teams there.In technical was asked many qns median of sorted array,search. In rotated array and other qns.was not able to design snake and ladder.rejected after this round.