Moderator System with Ranking, Communities, and Demotion
Company: Reddit
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: medium
Interview Round: Technical Screen
Overview: This question tests practical data structure design and object-oriented system modeling, requiring the implementation of a hierarchical moderator management system backed by time-ordered logs. It evaluates proficiency with ordered collections, hash maps, and linked list manipulation to support rank queries, permission checks, and rank mutations across multi-community scopes.