Amazon-tagged coding and data questions, plus the behavioral work the Leadership Principles rounds demand.
Pair Sum in a Sorted Array
Algorithms & Data Structures · The two-pointer warm-up every loop still asks.
Design an LRU Cache
Algorithms & Data Structures · Hash map plus doubly linked list, all operations O(1).
Top Earners per Department
SQL & Data · Window functions beat self-joins — know why.
Design a Rate Limiter
System Design · Token bucket, sliding window, and where the counters live.
Tell Me About a Conflict
Behavioral · STAR structure for the most common behavioral prompt.