amazon · data-scientist

Data Structures

Arrays, trees, graphs, and hashing.

Medium: 2

Concept Refresher

Read the concept summary before diving into questions to answer with clarity.

Topic Roadmap

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Data Structures Essentials

Focus on data structures fundamentals for this role.

Practice Questions

Given a stream of integers, design a data structure that can return the top-K elements at any time. Explain the time and space trade-offs.

heap, streaming, top-k

How would you design a rate limiter that supports burst traffic and quick lookups?

rate-limiting, token-bucket, redis

Test Your Knowledge

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