Design an In-Memory Spreadsheet Engine
Company: Harvey
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: hard
Interview Round: Technical Screen
Quick Answer: This question tests a candidate's ability to design a dependency-tracking data structure with efficient cache invalidation, drawing on graph traversal and topological ordering concepts. It evaluates practical system design and algorithms skills, particularly managing directed dependency graphs, cycle detection, and O(1) read performance through proactive cache propagation.