Ambience Healthcare·Software Engineer·Technical Phone Screen
Jul 2026
Interviewed for a Software Engineer role at Ambience Healthcare and got hit with a classic LRU cache design question. Pretty standard for a coding round but there were enough follow-up angles that it kept me on my toes.
- Design and implement an LRU cache with a fixed capacity that supports get and put operations in average O(1) time. Walk through your data structure choices, how you track recency on reads and writes, how you handle updates to existing keys, missing keys, and edge cases like a capacity of zero. Then analyze time and space complexity.
“I went with a hashmap plus a doubly linked list, which is the right call, but I fumbled explaining why the doubly linked list specifically.”