AppsFlyer Software Developer interview questions

Given a system (service, DB, MessageQueue), scale it. This was a very rigorous systems question, diving into: 1. scaling server access, by load balancing, sharding 2. caching, and discussions of consistent hashing for scaling caches 3. DB – how can you make fast reads, if writes are fast? Multiple replicas of the DB 4. Why would you use one queueing system over another? (Kafka vs RabbitMQ)

Design a consistent hashing strategy

Implement a Minesweeper game, focusing on: 1. Modeling the game 2. Initializing the board 3. Implementing the "revealing a box" functionality