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4 questions in the library. A source association does not guarantee a future interview question.
Coding · Practical engineering · System design
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Implement a rate limiter using a sliding window algorithm that tracks and limits the number of requests allowed within a given time window. Extend the…
Companies: Cloudflare, Adobe, Amazon, CrowdStrike +4
Last reported Sep 2026
Review a buggy Java implementation of a rate limiter using the Token Bucket algorithm, where tokens are refreshed at a fixed rate. Identify the bugs…
Companies: Cloudflare
Last reported Jul 2026
Given courses as nodes and prerequisite pairs as directed edges, determine whether the directed graph is acyclic — return true if a topological ordering exists…
Companies: Cloudflare, Amazon, Anduril, DoorDash +6
Breadth-First Search · Depth-First Search · Directed Acyclic Graph · Graph Theory
Last reported Feb 2026
Design a social media platform similar to Twitter but incorporating Amazon-style product features such as product recommendations, shopping integration, or e-commerce…
Companies: Cloudflare, Amazon, Asana, Brex +2
Last reported Jan 2026