One candidate reported that interviewers asked to Recover BST from two swapped nodes — inorder pattern and O(1) space twist asked at Amazon panels.
Hiring managers at Amazon frequently open with: Given a DAG of Amazon microservice deploy order, return all topological sorts up to a cap — discuss explosion risk.
Candidates were asked to How do you prioritize tech debt vs features — framework answer for Amazon PM-partnered loops.
A panel at Amazon reused this prompt: Cistern with leak + alternate pipes — classic OA staple still logged for Amazon 2026.
Campus hire notes highlight: Speed drill: train crosses platform in 40s vs pole in 20s — find train length ratio style seen near Amazon OAs.
A panel at Amazon reused this prompt: What is tail latency amplification in microservices — mitigation list for Amazon.
A typical live round for Amazon started with: Solve minimum cost to connect all points (MST variant) and justify Kruskal vs Prim for sparse graphs at Amazon.