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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Compute CIs, power, and multiple testing
A/B Testing Stats: Confidence Intervals, Power, Multiple Testing, and Clustering Context: You are planning an A/B experiment on a Bernoulli outcome (c...
Plan and analyze an A/B test
A/B Test: Power, Clustering, Sequential Monitoring, Multiple Comparisons, and Diagnostics Context You are planning an A/B test for a dashboard change ...
Generate primes up to n efficiently
Implement a function that returns all prime numbers in the inclusive range 1..n. Requirements: handle n up to 10^7 efficiently (time and memory); retu...
Solve stock, BFS path, and merge intervals
Solve three coding problems; justify complexity and corner cases. A) Best Time to Buy/Sell Stock (one transaction): Given prices[0..n-1] (integers), r...
Build a package-allocation model for couriers
Automatic Package-to-Courier Assignment with ML + Optimization You previously assigned packages to couriers manually. Design an end-to-end system that...
Describe a tough trade-off decision
Behavioral: Tough Trade-off Under Time Pressure (Software Engineer, Technical Screen) You will be asked to describe a specific instance where you made...
Determine max remainders and anagram after deletions
Part 1 (Array Remainders): Given an integer array A of length n with A[i] > 0. You may choose any integer array B of length n. Define C[i] = B[i] mod ...
Design secure multi-tier cloud infrastructure
System Design: Multi-tier VPC Architecture for a Large-Scale Application You are designing and deploying a production-ready, multi-tier network on AWS...
Design pickup point planning for ride-hailing
Design an algorithm and high-level system for recommending a pickup point in a ride-hailing app. A passenger requests a ride from an approximate city ...
Find two numbers that sum to target
Given an integer array nums of length n and an integer target, return the indices (i, j) (0-based) of two distinct elements such that nums[i] + nums[j...
Walk through an A/B test end-to-end
Walk through how you would design, run, and analyze an A/B test for a product change. Your answer should include: - Hypothesis framing and choosing pr...
Design an online bookstore for browse and purchase
Design an online bookstore for browse and purchase System Design: Online Bookstore (Browse + Purchase) Context Design an online bookstore that allows ...
Compute fruit spoilage time in a grid
Given an m×n grid representing kitchen cells: 0 for empty, 1 for fresh fruit, and 2 for spoiled fruit. Each minute, any fresh fruit adjacent (up, down...
Discuss deadline, challenge, feature
Discuss deadline, challenge, feature Behavioral Questions for a Software Engineer Phone Screen These prompts assess your ownership, delivery under pre...
Find Longest Activatable Server Streak
You are given a binary array serverStates, where 1 means a server is currently on and 0 means it is off. You may turn on at most k currently off serve...
Find a valid dependency order
You are given n tasks labeled from 0 to n - 1 and a list of dependency pairs dependencies, where each pair [a, b] means task b must be completed befor...
Build the Largest Available Sequence
You are given an integer array values, a binary string state of the same length, and an integer m such that 0 <= m <= values.length. Build a sequence ...
Minimize operations to reduce price difference
You are managing an inventory of products and want to adjust their prices. There are n products. The price of the i-th product is given by an integer ...
Implement ad matching and delivery routing
Implement ad matching and delivery routing Part A: Implement a data structure for an ad-matching service that supports add(campaign), remove(campaign)...
Describe achievements, ambiguity, conflict, efficiency, challenges
Describe achievements, ambiguity, conflict, efficiency, challenges Behavioral Technical Screen — Multi-part Prompt Context: You are interviewing for a...