Adobe Software Engineer interview questions

Interview scheduled through HR Firstly an online test for Apti(objective) and java(subjective) - same as can be found on net. Then onsite F2f in noida.. took a whole day for 3 technical rounds.. some basic core java questions on oops add 2 now without + op and with recursion small memory but large data—external sorting remove all files with particular ext in linux 10 boxes with 10 balls each, 9 have 10gmeach balls and 1 has 9gm balls— identify box wid 9gm in 1 electronic weight mirror binary tree abstract vs interfaces one case study to find all test cases for a system with 2 internal components.. these 2 components can talk safely.. but one component is being called from outside.. Hope it helps somebody.. Thanks