Hubspot OA

I recently went through the HubSpot OA process, which involved a 90-minute progressive question focusing on designing a cache system with store, fetch, update, and locking functionalities. The question required designing a data structure that could handle these operations efficiently. I had to consider thread safety and the mechanisms for locking data to prevent concurrent modifications. The challenge was to balance between performance and data consistency. I approached the problem by outlining the necessary operations and then thinking about the underlying data structures that could support them. I also considered edge cases, such as handling concurrent access and ensuring that updates were properly synchronized. While I was able to outline a solution, I felt that I could have delved deeper into the intricacies of thread safety and the specific locking mechanisms. Overall, the experience was intense but provided a good opportunity to think through complex system design problems.