Machine Learning Engineer + Data Scientist + Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
"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."
Compare convolutions and transformers
Compare CNNs and Transformers Task Explain the key differences between convolutional neural networks (CNNs) and transformer architectures. Specificall...
Describe pair programming communication approach
Pair Programming in a Timed Interview (ML Engineer) Context: You are in a timed, onsite pair-programming interview for a Machine Learning Engineer rol...
Design a scalable photo deduplication service
Design a scalable photo deduplication service System Design: Productionizing Duplicate-Photo Removal at Scale Context Design a production system that ...
Design a real-time game recommendation system
Design a real-time game recommendation system System Design: Real‑Time Game Recommendation System (Architecture Focus) You are designing a real‑time r...
Design a URL Shortener
This question evaluates system design and distributed systems competencies, including scalability, availability, data modeling, API design, caching, s...
Design real-time per-status device counts
This question evaluates a candidate's ability to design scalable, fault-tolerant real-time aggregation systems that produce per-minute status counts, ...
Explain Vision Encoders and LLM Bottlenecks
Answer the following machine learning system fundamentals questions: 1. What is a vision encoder, and what role does it play in a computer vision or m...
Explain Ensemble Learning and Its Main Families
Explain Ensemble Learning and Its Main Families Explain why combining multiple models can improve predictions. Compare bagging, random forests, boosti...
Implement Due Broadcast Sender
You are building a notification system. You are given: - A mapping from company_id to a list of subscriber IDs. - A list of broadcast logs. Each log c...
Explain Feature, Model, and Validation Choices
This question evaluates a candidate's competency in end-to-end machine learning project execution, including data processing workflows, feature creati...
Design a scalable resume search system
Design a scalable resume search system System Design: Resume Search Platform Context A recruiting company needs a platform where applicants can upload...
Implement Multiple Interview Coding Tasks
This multi-part prompt evaluates algorithmic problem-solving and data structure design skills across string processing and greedy formatting, dynamic ...
Design image and multimodal generation systems
System Design: Image Generation and Multimodal Generation Part 1 — End-to-End Image Generation System Design an end-to-end image generation system. Co...
Count Blocked Rate-Limited Requests
You are given an in-memory request log for a web platform. Each log entry has: - timestamp: an ISO-8601 UTC timestamp - request_ip: the client IPv4 ad...
Build a simplified Wordle game in React
This question evaluates a candidate's competency in React-based front-end development, covering component design, state management, asynchronous HTTP ...
Stabilize LLM inference and estimate needed repeats
This question evaluates skills in designing reliable LLM inference pipelines and in statistical modeling of stochastic outputs, including reproducibil...
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...
Design an in-memory cloud storage system
Design an in-memory cloud storage system In-Memory Cloud Storage: Files, Discovery, Users, and Compression Context: Design an in-memory storage librar...
Design a multi-device calendar application
This question evaluates system design competency in scalable backend architecture, data modeling for time-range queries, synchronization and conflict-...
Diagnose Google Meet Disconnections and Assess Business Impact
Diagnose Google Meet Disconnections and Assess Business Impact Enterprise clients report that Google Meet calls frequently disconnect. You need to dia...