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."
Design a Threshold-Based Database Partition Rebalancer
Design a Threshold-Based Database Partition Rebalancer You are given database partitions and a size threshold. Oversized partitions should be split in...
Design Trending Collaborative Files
Design Trending Collaborative Files Design a service that ranks currently trending collaborative files. Use the following scale and product rules as p...
Present and Defend Recent Research on AI Agents
Prepare and defend a research presentation about one recent project, then connect its lessons to AI-agent systems. Use your own work; do not invent re...
Navigate Challenges, Conflict, and Mentorship on a Major Project
Navigate Challenges, Conflict, and Mentorship on a Major Project Choose one substantial project that you personally helped deliver. Use concrete examp...
Design a Memo Q&A Agent for a Large Law Firm
This question evaluates ML system design skills, specifically retrieval-augmented generation (RAG) and LLM-grounded document retrieval at production s...
Design an LLM Inference Serving System
Design an LLM Inference Serving System Design a production system that serves inference requests for one or more large language models. Cover the requ...
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...
Design a Streaming Job Scheduler
Design and incrementally build a streaming job scheduler: a service (and supporting class) that continuously ingests tasks and dispatches them to work...
Design a Distributed Rate Limiter
This question evaluates competency in distributed systems architecture, API and data model design, performance engineering, and operational concerns s...
Handle Cross-Functional Pushback on an Analysis
Tell me about a time a cross-functional partner pushed back on your analysis, metric, or recommendation. How did you understand the disagreement, test...
Answer an LLM Systems Quick-Fire Interview
You are given a rapid-fire LLM systems interview. Be prepared to explain Transformer architecture, attention and masking, multi-head attention, normal...
Maintain an Out-of-Order Step Progress Tree
Maintain an Out-of-Order Step Progress Tree Each progress event contains: `text timestamp: integer step_id: integer parent_step_id: integer or null ru...
Design Video Generation Orchestration
Design a scalable system to orchestrate AI video generation (think Sora-style text-to-video). Users submit text prompts to generate videos. For each s...
Compute Point-to-Plane Distance and Fit a Robust Plane
Compute Point-to-Plane Distance and Fit a Robust Plane Use NumPy-style vectorized operations to solve both parts of this 3D geometry exercise. Constra...
Reason About Duplicate Data and Scaling in Spark
Reason About Duplicate Data and Scaling in Spark In a technical experience discussion, explain how you would identify and handle duplicate data in a S...
Determine Reachability for a Chinese-Chess Horse with Blocked Legs
Determine Reachability for a Chinese-Chess Horse with Blocked Legs Implement a function that determines whether a Chinese-chess horse can reach a targ...
Implement Bootstrap and Jackknife Estimates on a DataFrame
Implement bootstrap and jackknife uncertainty estimates for a statistic computed from a pandas DataFrame. Learn correct positional resampling, confide...
Derive Sharded Matrix Multiplication and Backpropagation
Derive Sharded Matrix Multiplication and Backpropagation Consider Y = X @ W, where X has shape (B, D) and W has shape (D, H). Training runs on P devic...
Discuss Leadership, Motivation, and AI Safety Values
Discuss Leadership, Motivation, and AI Safety Values Prepare concise, evidence-based answers for an exploratory interview covering your current leader...
Explain C++ Inline, Segfaults, Virtual Memory, and std::string Internals
Answer a C++ systems interview covering inline functions and inline variables, segmentation faults, MMU address translation, TLB and page tables, page...