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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Describe times exceeding and missing expectations
Behavioral Prompt: Exceeding and Falling Below Expectations Context You are interviewing for a Software Engineer role in a technical screen focused on...
Maximize optional tasks under daily limit
You are given an integer limit and two integer arrays required and optional of length n. For each day i, you must schedule required[i]. If time remain...
Discuss open-source contributions and impact
Behavioral Prompt: Open-Source Contribution Walkthrough Context: Technical screen for a Software Engineer role. Provide a concise, structured walkthro...
Clarify internship availability and conversion
Software Engineering Internship Availability and Conversion Context: During a technical screen for a Software Engineer internship, the interviewer nee...
Check path in N-ary tree
Given the root of an N-ary tree and a sequence of integers path[0..k-1], determine whether there exists a path starting at the root whose node values ...
Find longest common contiguous subarray
Given two integer arrays A and B, find the length of the longest contiguous subarray that appears in both arrays. If multiple exist, return any one pa...
Handle overwhelming recruiter prep and expectations
Behavioral Prompt: Handling Overwhelming Prep Under Short Notice Context You're preparing for an early-round HR screen for a Software Engineer role fo...
Determine string buildability from dictionary
Given a non-empty string s and a list of non-empty words dict, determine whether s can be formed by concatenating words from dict with unlimited reuse...
Explain a research project in depth
Walk Through a Research Project You Led (End-to-End) Provide a concise, structured narrative that demonstrates scientific rigor, engineering depth, an...
Detect words formed by multiple dictionary parts
Given an array words of up to 100,000 non-empty lowercase strings (total characters ≤ 1,000, 000), return all strings that can be formed by concatenat...
Find all pairs summing to target in sorted array
Given a non-decreasing array of integers nums and an integer target, return all unique pairs of indices (i, j) with i < j such that nums[i] + nums[j] ...
Compute tree diameter
Given a (potentially large) binary tree, compute its diameter (the number of edges on the longest path between any two nodes). Implement an O(n) solut...
Solve jumps and anagram-similarity problems
You are given two independent tasks. Task A (Maximize calories over jumps): - There are n blocks with integer heights height[i] ≥ 0. - You start on th...
Answer Dive Deep and Ownership in LP interview
Behavioral (Amazon LP): Dive Deep & Ownership The interviewer will probe your prior work and may connect follow-ups to the technical discussion. Promp...
Compute and interpret quantile loss vs RMSE
Quantile (Pinball) Loss vs RMSE/MAE; Computations and Calibration You are evaluating probabilistic forecasts for a time series/ML regression task. You...
Design a robust traffic forecasting pipeline
Forecasting Daily Amazon Retail Traffic: End-to-End Design You are given 5 years of daily Amazon retail site traffic counts. Design an end-to-end fore...
Profile and visualize an unfamiliar dataset
Task: Quickly Understand an Undocumented Events+Purchases CSV and Produce Executive-Ready Visuals Context You are handed a single CSV that mixes user ...
Find daily first-order merchants with SQL
Given the table below, write a single SQL query using window functions to: A) For each calendar date (UTC), return all merchant_id(s) whose order is t...
Design student–course data models and SQL
Scenario: Model a university domain with Students, Courses, Departments, Instructors, and Enrollments. Tasks: 1) OLTP ERD: Specify normalized tables w...
Prove new allocation outperforms manual baseline
Prove an Automated Package-Allocation System Outperforms Manual Baseline Context You work in a large last‑mile logistics network evaluating a new auto...