Amazon Loop in 2 Weeks

Pair Sum in a Sorted Array

Algorithms & Data Structures · The two-pointer warm-up: one pointer at each end.

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 · The most common behavioral prompt, told in STAR: a disagreement where you changed the outcome, or changed your mind.