Machine Learning Engineer ML System Design Interview Questions
Practice 179 real ML System Design interview questions for Machine Learning Engineer roles. From companies including OpenAI, Meta, Amazon, Snapchat, Google.
"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."
Design a news feed ranking system
Design a personalized news feed recommendation system. Requirements: - Low latency serving (real-time feed generation). - Personalization using user b...
Select high-quality math documents from crawls
Scenario You have a web crawler that collects raw HTML/PDF documents. You want to build a pipeline that identifies high-quality math documents suitabl...
Design an image/video near-duplicate detection system
Question Design a system to detect near-duplicate images/videos (e.g., reuploads, minor edits, different encodes) at large scale. Requirements - Suppo...
Design feedback-driven recommender
Design: Contextual Bandit Recommendation with Online Learning You are designing an online learning recommendation system. At each user interaction: - ...
Design a Short-Video Recommendation System
Design an end-to-end recommendation system for a short-video feed product. The system serves a large user base and must choose and rank videos for eac...
Design email ranking and summarization in Outlook
Scenario You are building ML features for an email client: 1) Debias email display order (inbox ranking) so users see the most relevant emails first w...
Design an ML keyword recommendation pipeline
ML System Design: Typed Search Keyword Recommendations for an App Marketplace Goal Design an end-to-end ML pipeline that, given a user query (e.g., "g...
Design ML system for self-driving perception
You are interviewing for a Senior Machine Learning Engineer role on a self-driving car team. They ask you to design a machine learning system for obst...
Design an ML Platform Portal
Design a web-based internal platform that gives machine learning engineers and data scientists a unified workflow for the full model lifecycle. The po...
Design a natural-language AEP Q&A assistant
System Design: Natural-Language Assistant for Adobe Experience Platform (AEP) Goal Design a natural-language assistant for AEP that helps marketers: 1...
Discuss Transformer LLM Design
System-Design-Oriented LLM Question Context: You are designing, fine-tuning, and operating a Transformer-based large language model (LLM) that answers...
Design comment ranking for a news feed
Design an ML-powered system to rank comments under posts in a news feed product. Requirements - For each feed item (post/story), users can open the co...
Design logo infringement detection system
Scenario You work for a large e-commerce company. Brands register their official logos with you (e.g., Nike swoosh, Apple logo, etc.). Third-party sel...
Design a Multimodal Neural Network
Design Prompt: Multimodal Text–Image Retrieval and Classification Context You are building a production system that uses both text (titles/description...
Build an end-to-end ML classification pipeline
End-to-End Tabular Classification Pipeline (Python) Context You are given a tabular dataset in a CSV file and asked to build an end-to-end machine lea...
Design an ML search system
Design an ML‑Powered Enterprise Document Search System Context You are designing a multi‑tenant enterprise search system that indexes documents from m...
Design a Skills inference system
Design an end-to-end ML system to power a "Skills" feature for a professional social network. The product wants to: - Extract and infer a member’s ski...
Design a weapon-sale ad detection system
Design an end-to-end ML system to detect and take action on ads/listings that attempt to sell weapons (or weapon-related prohibited items). Your syste...
Design an HR Document AI Platform
Design an internal AI platform for a bank's HR organization. The platform should ingest HR documents such as policies, benefits guides, onboarding man...
Design a Trustworthy Ranking System
Design a trustworthy ranking system for a large consumer platform that ranks items such as products, videos, or posts for each user. The system should...