Amazon Coding & Algorithms Interview Questions
Practice 600 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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Share examples of impact and simplicity
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Design a weighted random value generator
Weighted random value generator Design a generic component that stores values with integer weights and can return a random value with probability prop...
Design a large-scale temperature sensor system
System design: large-scale temperature sensor collection and visualization Design a system to collect and display temperature data from a very large n...
Design globally consistent metadata service
System Design Prompt Design a global-scale metadata service used by many internal products. Goals / Requirements - Writes must be strictly consistent ...
Review an existing architecture for risks
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Solve Algorithmic Challenges in Online Coding Assessments
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Analyze Monthly Prime vs Non-Prime Sales and Price Buckets
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Identify P-Value Limitations and Complementary Approaches
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Implement and Analyze 'Merge k Sorted Lists' Algorithm
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Prioritize Tasks and Respond to Coworker Concerns
Task Prioritization and Coworker Response Simulation (Data Scientist) Context You are a Data Scientist supporting a high-traffic e-commerce recommenda...
Assess Leadership Through Disagreement, Failure, and Risk Examples
Behavioral Leadership Deep-Dive (Data Scientist Onsite) Scenario A leadership-principles deep-dive will assess ownership, bias for action, and learn-a...
Design ad clickstream analytics pipeline
Question Design an end-to-end advertising clickstream ingestion and analytics platform that ingests events through Kafka, stores raw and curated data ...
Respond to negative feedback and exceed requirements
Behavioral Question: Negative Feedback and Going Beyond Requirements Context: Software Engineer — Technical Screen (Behavioral & Leadership) Answer bo...
Evaluate actions in Amazon simulation
Amazon Work Simulation: Purpose, Modules, and Design Decisions Context and Assumptions The Work Simulation is a timed, scenario-based assessment used ...
Design a no-repeat top-frequency music player
You are building a music player that receives a stream of new users and their song lists. Each event is: - addUserSongs(userId, songs): a new user arr...
Solve median extremes and segment flips
Part A — Sliding-window median extremes: - Input: an integer k (1 ≤ k ≤ n) and an array nums of length n. - For every contiguous subarray of length k,...
Implement a robust shell CLI
Implement a POSIX-compliant shell script invoked as ./script.sh <username> <path_of_file> that outputs a single line formatted as "<timestamp> <licens...