Amazon Coding & Algorithms Interview Questions
Practice 689 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 Linux and SQL experience
You are being assessed on basic tooling skills as an engineer. Answer: 1. Linux/Unix commands: list commands you are comfortable with and briefly expl...
Explain deep learning and transformer concepts
Deep Learning, Transformers, and Audio ML Concepts You are interviewing for a machine-learning role focused on sequence and audio modeling, such as sp...
Answer Amazon PM Behavioral Questions
In an Amazon non-technical Product Manager phone screen, the interviewer asks three behavioral questions, each followed by 2-3 probes for detail. Prep...
Evaluate delivery driver performance
You are interviewing for an Amazon non-technical product or operations role. The interviewer asks: How would you evaluate delivery driver performance?...
Add One Source to Minimize Grid Inconvenience
Add One Source to Minimize Grid Inconvenience Implement min_max_inconvenience(grid). grid is a non-empty rectangular matrix containing 0 and 1. A cell...
Implement Regular Expression Matching
Implement Regular Expression Matching Determine whether an entire input string matches a pattern containing lowercase letters and two special symbols:...
Unify Stock-Trading Profit Variants
Unify Stock-Trading Profit Variants Given daily stock prices, return the maximum profit when you may complete at most max_transactions buy-then-sell t...
Leaf Domain Cumulative Scores
This question evaluates a candidate's ability to model hierarchical string data and aggregate values along a tree structure, a common pattern in codin...
Implement Multi-Head Attention from Scratch in NumPy
This coding question tests a machine learning engineer's understanding of Transformer internals by requiring a from-scratch NumPy implementation of mu...
Caesar Cipher with Translation-Table Optimization
This question tests practical string manipulation and modular arithmetic by requiring implementation of a classic Caesar cipher with correct case-pres...
Merge Overlapping Time Ranges
This question evaluates a candidate's ability to work with interval merging, a core array and sorting problem in technical interviews. It tests unders...
Inventory Allocation by Bid Priority
This question assesses simulation and priority-queue design skills, requiring careful implementation of tiered, round-robin resource allocation under ...
Evaluate an Arithmetic Expression in Postfix Notation
Practice a Amazon coding interview problem focused on evaluate an arithmetic expression in postfix notation. The prompt emphasizes edge cases, clean i...
Determine if all courses can be completed
This question evaluates graph-theoretic dependency modeling and cycle-detection competency, measuring the ability to represent course prerequisites as...
Replace Delimited Tokens in a String
This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...
Minimize Circular Redistribution Cost
This question evaluates algorithmic problem-solving skills in array manipulation, circular data structures, load balancing, and cost optimization whil...
Find the Most Common Visit Pattern
This question evaluates the ability to process timestamped event logs and extract ordered length-3 visit sequences, testing skills in sorting, frequen...
Merge Multiple Sorted Arrays
This question evaluates a candidate's competency in array manipulation, merging techniques, and algorithmic complexity analysis, including handling ed...
Maximize Value Under a Budget
This question evaluates combinatorial optimization and algorithm design skills for resource-constrained selection problems, focusing on concepts exemp...
Find a Valid Course Order
This question evaluates graph algorithm skills—specifically topological ordering, directed cycle detection, and analysis of time and space complexity....