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Very hard · neutral · no offer · Posted 13 days ago
SEED: Bar was very high. Failed the system-design round. Interviewers were kind but the rubric is steep.
Practice 2-3 high-scale system designs (URL shortener, news feed, Uber). Speak through trade-offs out loud.
system design
Design the news-feed backend for 1B users.
Fan-out vs fan-in, hot-shard problem, cache invalidation.
coding
Implement a thread-safe LRU cache.
HashMap + DoublyLinkedList; lock or use ConcurrentSkipListMap.