Real Coding & ML Interview Questions

3,545 reported questions, newest reports first. Browse by company or by topic.

• In-Memory Rate Limiter from a Worked Trace
  PatreonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Oct 5, 2026
• Two-Player Array Picking Game with Reverse-on-Odd Rule (Score Difference)
  ADIACoding & Leetcode-style QuestionsDifficulty 3/5Last asked Oct 3, 2026
• Business Round: Do You Care How Underwriting Actually Works
  FurtherAIBehavioralDifficulty 3/5Last asked Oct 3, 2026
• Build a Workflow Service, Using an AI Assistant
  FurtherAICoding & Leetcode-style QuestionsDifficulty 3/5Last asked Oct 3, 2026
• Product Intuition: Cutting Scope to Ship
  FurtherAIBehavioralDifficulty 3/5Last asked Oct 3, 2026
• Work Queue with Task Dependencies (Leases, Retries, Dead-Letter)
  OpenAICoding & Leetcode-style QuestionsDifficulty 4/5Last asked Oct 3, 2026
• Fault-Tolerant Work Queue (Leases, Retries, Dead-Letter)
  OpenAICoding & Leetcode-style QuestionsDifficulty 4/5Last asked Oct 3, 2026
• Project Deep Dive: How You Actually Used AI to Build It
  FurtherAIBehavioralDifficulty 3/5Last asked Oct 3, 2026
• CTO Round: Why a Startup, and Why This One
  FurtherAIBehavioralDifficulty 2/5Last asked Oct 3, 2026
• K-Means Clustering on Image Patches
  TeslaDeep Learning & ArchitecturesDifficulty 5/5Last asked Sep 10, 2026
• Trajectory Waypoint Distance Queries
  TeslaCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Sep 10, 2026
• Classify a Float Into One of Two Arrays
  Google DeepMindML Fundamentals & AlgorithmsDifficulty 3/5Last asked Aug 27, 2026
• Distributed Device Control
  OpenAISystem Design for MLDifficulty 4/5Last asked Aug 19, 2026
• Twitter Insight Platform (CodeSignal Take-Home)
  xAIMLOps & DeploymentDifficulty 3/5Last asked Aug 19, 2026
• ML Debugging (Transformer)
  OpenAIDeep Learning & ArchitecturesDifficulty 4/5Last asked Aug 15, 2026
• Linear Algebra (BP)
  OpenAIDeep Learning & ArchitecturesDifficulty 4/5Last asked Aug 9, 2026
• Boolean Rule Parser and Evaluator
  StripeCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jul 20, 2026
• Email Log Grouping and Sorting
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 20, 2026
• Debugging: CSV Parser Quote Handling
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 20, 2026
• Weekly Deployment Window Scheduler
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 18, 2026
• Stock Transaction Sequence Counting (Catalan / DP)
  OptiverCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 15, 2026
• Design a Pickup Area Driver Queue
  UberSystem Design for MLDifficulty 4/5Last asked Jul 11, 2026
• Build an Arithmetic Expression to Reach a Target
  WaymoCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 9, 2026
• Agents / Coding with LLMs
  AnthropicLLMs & Prompt EngineeringDifficulty 4/5Last asked Jul 7, 2026
• Video-Keyword Association Review System
  ByteDanceSystem Design for MLDifficulty 3/5Last asked Jul 7, 2026
• Minimum Talent-Complete Team from Every Start
  Walmart LabsCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 7, 2026
• Merge Strings Alternately
  Walmart LabsCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jul 7, 2026
• AI-Assisted Full-Stack OA (Spring Boot and React)
  Walmart LabsCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 7, 2026
• Project Deep Dive (Resume Drill)
  ByteDanceML Fundamentals & AlgorithmsDifficulty 3/5Last asked Jul 6, 2026
• Number of Islands and Grid BFS Variants
  ByteDanceCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 6, 2026
• Content Moderation System Design
  ByteDanceSystem Design for MLDifficulty 4/5Last asked Jul 6, 2026
• L6 Staff System Design Loop (Google)
  GoogleSystem Design for MLDifficulty 5/5Last asked Jul 6, 2026
• Highest Average Score Per Person
  Goldman SachsCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jul 6, 2026
• Race Car: Minimum Instructions to Reach a Target
  WaymoCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jul 6, 2026
• Campaign Cost Weekly Partition
  SalesforceCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 5, 2026
• Behavioral: Amazon Leadership Principles Standard Set
  AmazonBehavioralDifficulty 2/5Last asked Jul 4, 2026
• Behavioral: GenAI Usage, Failure, and Tradeoffs
  AmazonBehavioralDifficulty 2/5Last asked Jul 4, 2026
• Reachable Nodes in a Directed Graph
  SoFiCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 4, 2026
• LLM SQL Chatbot Access Control and Query Safety
  NVIDIASystem Design for MLDifficulty 3/5Last asked Jul 3, 2026
• Data Platform, Pipeline, and ML Operations Fundamentals
  NVIDIAMLOps & DeploymentDifficulty 3/5Last asked Jul 3, 2026
• SRE Linux / Networking Troubleshooting Round
  ByteDanceCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 3, 2026
• Hardware-Adjacent Project Deep Dive
  NVIDIABehavioralDifficulty 3/5Last asked Jul 3, 2026
• Hiring Manager / Final Behavioral Round
  ByteDanceML Fundamentals & AlgorithmsDifficulty 3/5Last asked Jul 3, 2026
• Culture Fit, Motivation, and Learning Habits
  NVIDIABehavioralDifficulty 3/5Last asked Jul 3, 2026
• Telemetry Collector and GPU Utilization Dashboard
  NVIDIASystem Design for MLDifficulty 3/5Last asked Jul 3, 2026
• AI Code Craft Challenge: Delayed-Delivery Workflow Engine
  DoorDashCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• ML System Design: Restaurant / Store Recommendation
  DoorDashSystem Design for MLDifficulty 4/5Last asked Jul 2, 2026
• MLE ML Knowledge and Discussion Round
  DoorDashML Fundamentals & AlgorithmsDifficulty 4/5Last asked Jul 2, 2026
• Harvey Values / Behavioral
  HarveyBehavioralDifficulty 3/5Last asked Jul 2, 2026
• Top-K Frequent in Large Logs
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• Longest Consecutive Path in Binary Tree
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• Core Dump Collection System Design
  AmazonSystem Design for MLDifficulty 4/5Last asked Jul 2, 2026
• Trie Prefix Search / Autocomplete
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• Implement Max Pooling with Argmax Coordinates
  WaymoCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• Hiring Manager Behavioral Round
  DoorDashBehavioralDifficulty 2/5Last asked Jul 2, 2026
• Path Between Nodes in a Fibonacci Tree
  DatabricksCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jul 2, 2026
• Basic Calculator with Postfix Notation
  AmazonCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jul 2, 2026
• Closest Version Date to a Target
  AmazonCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jul 2, 2026
• Spreadsheet / Formula Engine
  HarveyCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• Maximum Concurrent Processes from Intervals
  AmazonCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jul 2, 2026
• Text Highlighting / Citation Tagging
  HarveyCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 2, 2026
• ML Systems Codebase Deep Dive on One Project
  AppleMLOps & DeploymentDifficulty 3/5Last asked Jul 1, 2026
• Design a Pizza Ordering and Fulfillment System (OOD)
  AmazonSystem Design for MLDifficulty 3/5Last asked Jul 1, 2026
• Piano Hand Movement Grouping
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 1, 2026
• AI-Conducted Recruiter Screening Interview
  SnowflakeBehavioralDifficulty 2/5Last asked Jul 1, 2026
• Service Shutdown via Topological Propagation
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 1, 2026
• Closest Bathroom / Desk on a Grid
  SnowflakeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jul 1, 2026
• Expense Rules Engine (Extensible)
  RipplingCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jul 1, 2026
• Design a GPU Scheduling Platform
  OpenAIAnthropicSystem Design for MLDifficulty 4/5Last asked Jun 30, 2026
• REST API Integration and Aggregation
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• ML Foundations: Optimizers, Scaling Laws, K-Means, GMM
  MetaML Fundamentals & AlgorithmsDifficulty 3/5Last asked Jun 30, 2026
• AI-Assisted (Prompt-Driven) Coding Round
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• ML Fundamentals Quick-Fire
  PinterestCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• Implement Attention with Flash / Linear Attention Follow-ups
  MetaCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jun 30, 2026
• HPC Host Control Plane and Job Coordination
  NVIDIASystem Design for MLDifficulty 3/5Last asked Jun 30, 2026
• Business Account Data Verification (KYC)
  StripeCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• Mako Template Engine Debugging Round
  StripeCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jun 30, 2026
• HM Behavioral: Scale and Scope of Past Work
  RobloxBehavioralDifficulty 3/5Last asked Jun 30, 2026
• Object-Oriented Design Round
  MicrosoftSystem Design for MLDifficulty 3/5Last asked Jun 30, 2026
• Drone Delivery on a Hub Ring — Minimum Travel
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• AI Assistant Repo Bug-Fix (OA Part 2)
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• Boundary Search + Sliding-Window Top K
  CitadelCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 30, 2026
• Hiring Manager Interview Questions
  AnthropicML Fundamentals & AlgorithmsDifficulty 4/5Last asked Jun 29, 2026
• Battle Monsters
  OpenAICoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 29, 2026
• Grid Infection and Immunity Simulation
  OpenAICoding & Leetcode-style QuestionsDifficulty 5/5Last asked Jun 29, 2026
• Fastest Commute Mode Through a Grid
  DatabricksCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 29, 2026
• Design a URL Shortener (TinyURL)
  MicrosoftSystem Design for MLDifficulty 4/5Last asked Jun 29, 2026
• Mars Rover / Robot Controller (CLI)
  ShopifyCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 29, 2026
• Minimum Window Substring
  MetaCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jun 29, 2026
• Grid Shortest Path with K Obstacle Eliminations
  ByteDanceCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 29, 2026
• Topological Sort with Declaration-Order Tie-Breaking
  RobloxCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 29, 2026
• Social Network with Immutable Snapshots + Followers Index + Recommendations
  OpenAICoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 28, 2026
• AI Coding — Maximum Unique Character Subset
  MetaCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 28, 2026
• Premium Product Recommendation System
  IntuitSystem Design for MLDifficulty 3/5Last asked Jun 28, 2026
• Design a Real-Time Log Processing System
  AppleSystem Design for MLDifficulty 4/5Last asked Jun 28, 2026
• Design a User Behavior / Metrics Monitoring Aggregator
  RipplingSystem Design for MLDifficulty 4/5Last asked Jun 28, 2026
• Hotel Booking System OOD with Concurrency
  AppleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 28, 2026
• Inventory Allocation by Bid Priority
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 28, 2026
• Array Plus One with Large-Input Follow-Up
  IntuitCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jun 28, 2026
• Binary Tree Vertical Order Traversal
  AppleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 28, 2026
• Find Conflicting Events
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 27, 2026
• Org-Chart Salary Aggregation
  AmazonCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 27, 2026
• Design Prompt Playground
  AnthropicSystem Design for MLDifficulty 3/5Last asked Jun 26, 2026
• GPU Credits 2
  OpenAICoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Batch Processing of High Dimensional Data
  AnthropicML Fundamentals & AlgorithmsDifficulty 3/5Last asked Jun 26, 2026
• Behavior Interview (Culture)
  AnthropicResearch & Paper UnderstandingDifficulty 3/5Last asked Jun 26, 2026
• System Design: Chess Game
  OpenAISystem Design for MLDifficulty 3/5Last asked Jun 26, 2026
• Shard Rebalance / Overlapping Key Range
  OpenAICoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• ML Fundamentals Deep Dive (AI/ML & MLE Roles)
  GoogleML Fundamentals & AlgorithmsDifficulty 4/5Last asked Jun 26, 2026
• Design an AI Prompt Playground
  AnthropicSystem Design for MLDifficulty 4/5Last asked Jun 26, 2026
• Project Deep Dive and Hiring-Manager Behavioral Round
  RipplingBehavioralDifficulty 3/5Last asked Jun 26, 2026
• Meeting Rooms: Minimum Rooms to Hold All Meetings
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Thread-Safe Durable Log Writer
  DatabricksCoding & Leetcode-style QuestionsDifficulty 4/5Last asked Jun 26, 2026
• Longest-Match Tokenization with UNK and Optional UNK-Run Compression
  AnthropicCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Generalized M×N Tic-Tac-Toe with Win Length K
  DatabricksCoding & Leetcode-style QuestionsDifficulty 2/5Last asked Jun 26, 2026
• 2D Points Connected Components by Radius
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Coding Q6 — Longest-Match Tokenizer
  AnthropicCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Website Activity Analytics: Unique Users + Session Time
  GoogleCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026
• Design a Network Throttling / Rate-Limiting System
  DatabricksSystem Design for MLDifficulty 4/5Last asked Jun 26, 2026
• Layover Experiences — Exact-Fill with Min Count
  AirbnbCoding & Leetcode-style QuestionsDifficulty 3/5Last asked Jun 26, 2026