Amazon Coding & Algorithms Interview Questions
Practice 597 real Amazon interview questions for 2026. Covers all top categories — Coding & Algorithms, Behavioral & Leadership, Machine Learning, Data Manipulation (SQL/Python), and System Design — across Software Engineer, Data Scientist, Machine Learning Engineer, Product Manager, and Business Intelligence Engineer roles. Real Amazon interview questions from actual interviews with detailed solutions; use this collection for interview preparation that emphasizes shipping at scale, measurable impact, and the company’s Leadership Principles. Expect coding-heavy assessments for Software Engineer candidates: frequent tree and dynamic-programming problems, two-array optimization patterns, nested object/path lookups, and system-design prompts that mirror product flows (online Minesweeper, pizza-ordering, credit-card and shipping/cost systems), plus leadership and collaboration behavioral prompts. Data Scientist rounds concentrate on experimentation and metrics (A/B design, hand p-values, D7 retention SQL), RAG/recommender evaluation, and product-impact analyses. ML Engineer questions focus on production model design, LLM/agent concepts, reliability (cold start, training stability, online vs offline gaps), and large-scale detection pipelines. PM interviews stress customer-obsessed stories, ambiguity, Alexa product launches, and domain-specific data pipelines. Prepare with timed coding practice, end-to-end experiment writeups, STAR stories framed to Leadership Principles, and mock system-design sessions.

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Fix the Password Reset Workflow
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Find the Most Common Visit Pattern
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Answer Amazon-style behavioral questions
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Answer Amazon Behavioral Questions
Question You are in the behavioral portion of an Amazon final-round interview (Software Development Engineer internship). Prepare strong, structured r...
Implement a Worker Hours Register
Implement an in-memory WorkHoursRegister system for contract workers. The system tracks office entry and exit events, completed work time, promotions,...
Design an advertiser metrics tracking platform
Design the core object-oriented model and service interfaces for an advertising metrics tracking platform. The platform is used by advertisers to trac...
Maximize Value Under a Budget
You are given an array of items. Each item has a price and a value, and you are given a total budget. Each item can be purchased at most once. Impleme...
Implement a Single-Node Priority Pub/Sub
Implement a simplified in-memory publish-subscribe system that runs on a single machine. The system should support users subscribing to topics with a ...
Explain NLP/RL concepts used in LLM agents
You are interviewing for an applied ML role focused on LLM agents and retrieval-augmented generation (RAG). Answer the following conceptual questions ...
Find Valid IP Addresses in Files
You are given an absolute or relative path to a directory on the local file system. Write a program that recursively traverses every subdirectory unde...
Count Connected Components in an Undirected Graph
You are given n nodes labeled from 0 to n - 1 and a list of undirected edges. Each edge is represented as a pair [u, v], meaning there is an undirecte...