Netflix Interview Questions
Practice 106 real Netflix interview questions for 2026 — Netflix interview questions tailored for high-impact engineering and data roles. Covers all top categories — Coding & Algorithms, System Design, Behavioral & Leadership, Analytics & Experimentation, and Data Manipulation (SQL/Python). Real questions from actual interviews with detailed solutions to power your interview preparation and sharpen the problem types Netflix favors. Expect a coding- and design-heavy process: Software Engineer loops dominate, followed by Data Scientist, Machine Learning Engineer, and Data Engineer screens. For Software Engineers (42 questions) the emphasis returns again and again to ads-platform design (frequency capping, demand-side schemas, ad data models), product-facing rendering and deduplication for the homepage, concurrent systems and latency-percentile tracking, plus algorithm problems on trees, graphs and sliding-window arrays. Data Scientists (28) focus on causal inference and experiment analysis (ATE/ITT/TOT/LATE, noncompliance), ranking A/B tests, conversion propensity models and SQL retention cohorts alongside core probability. Machine Learning Engineers (7) test ML platform and scheduling design plus transformer/tokenization fundamentals; Data Engineers (3) emphasize reliable click aggregation, config rollout strategies, and search/JSON-path implementations. Prepare by practicing representative coding problems, system designs, experiment writeups, and clear metric-driven stories.
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Design Prefix-Aware Deduplication for Homepage Content Rows
Design Prefix-Aware Deduplication for Homepage Content Rows A homepage contains ordered rows of content IDs. Each row has its own ordered candidate li...
Plan Eviction and Cleanup for a Production Cache
Plan Eviction and Cleanup for a Production Cache A process-local timed cache is correct for basic puts and gets, but it can still exhaust memory, reta...
Count Pairs of Strings with Disjoint Character Sets
Count Pairs of Strings with Disjoint Character Sets Problem Implement countDisjointStringPairs(words) -> count. Count unordered index pairs (i, j) wit...
Design ad frequency capping
Design an Ad Frequency Capping System Design a frequency capping system for an advertising platform. The system must ensure that a user does not see t...
Find the Longest Substring Without Repeated Characters
Find the Longest Substring Without Repeated Characters Problem Implement longestUniqueSubstringLength(text) -> length. Return the length of the longes...
Find the Longest Run of One Character
Find the Longest Run of One Character Problem Implement longestIdenticalRun(text) -> length. Return the maximum number of consecutive positions contai...
Answer Netflix Culture Screen Questions
You are 7 years into your career and have just been contacted by a Netflix recruiter on LinkedIn for a Software Engineer role on an advertising team (...
Discuss Collaboration, Feedback, and Conflict
Discuss Collaboration, Feedback, and Conflict Prepare three evidence-based behavioral examples: one about collaboration, one about handling feedback, ...
Design an Ad Pacing System
Design an advertising pacing system for a large-scale video / streaming advertising platform. Advertisers create campaigns with budgets, flight dates ...
Reason About a Movie Billboard Rotation Component
Reason About a Movie Billboard Rotation Component An interview exercise concerns a movie billboard rotation component. The retained description says n...
Design a Scheduler for ML Training and Batch Inference Jobs
Design a Scheduler for ML Training and Batch Inference Jobs Design a scheduler for machine-learning compute jobs. Focus on training and batch inferenc...
Design a File Backup System
Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...
Design Publisher Configuration Rules
Design a supply-side advertising configuration system that manages publisher-specific rules. A publisher may own many websites, mobile apps, channels,...
Design an ad frequency capping system
Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...
Design a thread-safe key-value store
You are working on infrastructure for an AI platform. Inside a single process, many worker threads need to share a simple in-memory key–value store; a...
Design Ad Frequency and Order Tracking
This question evaluates system-design competencies for building low-latency, high-throughput ad-platform components—specifically a real-time frequency...
How do you give and receive feedback?
Behavioral questions about feedback: 1) Tell me about a time you had to give constructive feedback to a teammate or cross-functional partner (e.g., PM...
Estimate ATE of personalization on streaming
You are given a user-level dataset from an online experiment that randomized personalization (treatment) vs no personalization (control). Assume one r...
Solve String Arrays and Row Deduplication
This multi-part question evaluates array and string manipulation skills, deduplication logic and pairwise character comparison, as well as the ability...
Answer core probability and statistics questions
Answer the following interview-style probability/statistics questions. Provide formulas and short explanations. 1) Bayes’ rule: State Bayes’ rule. Giv...