Amazon Interview Questions
Practice 631 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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Optimize attention for long sequences
Optimize attention for long sequences System Design: Efficient Attention for Long Sequences Context You are designing or optimizing sequence models th...
Deep dive a resume project
Deep dive a resume project End-to-End ML Project Walkthrough (System Design Focus) Pick one ML project from your experience and walk through it end-to...
Describe Overcoming Obstacles and Taking Calculated Risks
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Determine Probability of Both Children Being Boys
Conditional Probability: Two Children A family has two children. You learn that at least one of them is a boy. Answer the questions below and state yo...
Identify SQL Joins and Correct Query Errors
Winner +----+-------+ | ID | Name | +----+-------+ | 1 | Alice | | 2 | Bob | | 3 | Carol | +----+-------+ Loser +----+-------+ | ID | Name | ...
Optimize Predictive Analytics: Feature Engineering to Model Evaluation
End-to-End Predictive Analytics Project Walkthrough You are interviewing for a Data Scientist role. The interviewer asks you to describe a predictive ...
Print all odd numbers from an integer list
Problem Given a list/array of integers nums, print (or return) every odd number in the list, in the same order they appear. Clarifications / follow-up...
Amazon Leadership Principles Behavioral Scenarios
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Maximize memory capacity with primary-backup servers
You are helping to optimize the capacity of a cloud system. There are n servers, where n is always even. The memory capacity of the i-th server is giv...
Describe handling deadlines, conflicts, feedback, and ownership
Behavioral Interview Prompts — Software Engineer (Onsite) Context: You will be asked to share specific, first-person examples using a structured forma...
Implement a formatted shell script output
Implement a formatted shell script output Write a shell script named script.sh that is invoked as: ./script.sh <username> <path_of_file>. It must prin...
Design a hierarchical locking tree
Design a hierarchical locking tree Design a LockingHierarchy data structure over a rooted tree of N nodes labeled 0..N-1, initialized with an integer ...
Find odd-frequency element with O(1) space
You're given an integer array where exactly one value appears an odd number of times and all other values appear an even number of times. Implement a ...
Count unique Morse-code word transformations
Given an array of lowercase strings words. Each letter 'a' to 'z' has a corresponding Morse code string (standard 26-letter mapping). A word’s transfo...
Compute optimal locker placement with obstacles
Compute optimal locker placement with obstacles Given house coordinates H = {(xi, yi)} and tree coordinates T = {(xj, yj)} on a 2D integer grid, choos...
Share examples of impact and simplicity
Share examples of impact and simplicity Behavioral prompt: Exceeding customer expectations and simplifying complex problems Context You are in a softw...
Solve sliding-window and heap problems
Question Design an algorithm using a sliding window to compute the maximum sum of any contiguous subarray of length k; explain time- and space-complex...
Compute 3-Day Rolling Revenue Averages with Pandas
sales +------------+-----------+-------+---------+ | date | product_id| units | revenue | +------------+-----------+-------+---------+ | 2023-01...
Generate Synthetic Clickstream Data with Python Function
Scenario The analytics team needs to generate synthetic click-stream records to test a new reporting pipeline before real traffic arrives. Question Wr...
Design a Machine Learning Recommendation System Pipeline
Design a Machine Learning Recommendation System Pipeline System Design: End-to-End ML Recommendation System Scenario You are building an end-to-end ma...