5 rounds in total. Data structure, system design, algorithm, SDLC and culture. System design. Design a distributed file system. Questions asked included: http requests, storage, how to scale, etc. Data structure. Array, list, listNode, HashMap, Binary Search Tree, Red-Black Tree, TreeMap, etc. Algorithm. Trapping rain water. SDLC, some agile questions. Motivation, previous experience, how to self-improve