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.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Solve server updates and grid inconvenience minimization
1) You are given an integer array server of length n, where server[i] is the number of requests the i-th server can process. Over multiple days, you r...
Describe complex projects, failures, and pivots
In a software engineering internship interview, you may be asked a set of behavioral questions about project complexity, decision-making, failure, and...
Amazon Leadership Principles – Behavioral Deep Dive
Amazon Leadership Principles Behavioral Deep Dive Prepare for an Amazon Product Manager Leadership Principles behavioral interview. For each prompt, t...
Design a fraud detection system
Design a Real-Time Payment Fraud Detection System Design an ML-powered system that scores each online card-not-present (CNP) payment during authorizat...
Debug distributed-system performance problems
You are asked: “If a distributed system has a performance problem (latency/throughput regression), how would you approach it?” Describe a practical, s...
Design a scalable parking lot system
Design a scalable parking lot system System Design: Multi-Level Parking Lot Service Context Design a production-grade parking lot system for a large, ...
How would you analyze and test a price increase?
Case Study (Product / Data Science) You work on a subscription-based AI video editing/creation product and leadership is considering raising prices (e...
Compare decision trees and random forests
Compare decision trees and random forests. In your answer, discuss: - How a single decision tree is built and its main advantages and disadvantages. -...
Design an email spam detection system
Design an email spam detection system System Design: End-to-End Email Spam Detection Context Design an end-to-end system that detects and handles spam...
Find Conflicting Events
This question evaluates algorithmic problem-solving in coding and algorithms, focusing on grouping, sorting, and sliding-window techniques applied to ...
Kth Largest Perfect Binary Subtree
This question evaluates a candidate's ability to combine tree traversal with structural validation, requiring recognition of perfect binary subtrees a...
Implement Top-p (Nucleus) Sampling in NumPy
This coding question tests practical implementation of top-p (nucleus) sampling, a core decoding strategy in large language models. It evaluates NumPy...
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 ...
Build a responsive grid of fixed boxes
This question evaluates front-end layout and responsiveness skills including HTML/CSS and React component rendering, plus performance scaling for larg...
Explain owning and debugging infra modules
Describe a time you were responsible for a storage/distributed-systems/infra component (or a similarly low-level, reliability-critical module). The in...
Find the K-th Smallest Value in Two Sorted Arrays
Find the K-th Smallest Value in Two Sorted Arrays Given two nondecreasing integer arrays and a one-based integer k, return the k-th smallest value in ...
Discuss deadlines, feedback, and deep dives
Question This Amazon software engineer behavioral screen walks through a set of leadership-principle prompts. Be ready to tell a distinct, recent stor...
Detect and Break a Cycle in a Singly Linked List
This question tests practical knowledge of linked list traversal and pointer manipulation, specifically the ability to detect and resolve cycles using...
Minimum Bills and Coins to Make Change
This question tests a candidate's grasp of greedy algorithms applied to a classic coin-change problem with fixed denominations. It evaluates practical...
Minimum Drone Delivery Time on a Ring of Hubs
This question tests a candidate's grasp of circular graph traversal and greedy distance minimization on ring-structured topologies. It evaluates algor...