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."
Analyze User Comment Distribution and Sampling Effects
Analyze User Comment Distribution and Sampling Effects You are analyzing daily comment counts per user. The individual user-level distribution is righ...
Describe Handling Unexpected Changes and Data-Driven Conflicts
Describe Handling Unexpected Changes and Data-Driven Conflicts This behavioral interview prompt assesses cultural fit, ownership, communication, adapt...
Compare Logistic Regression and Random Forest in Limited Data Scenarios
Compare Logistic Regression and Random Forest in Limited Data Scenarios You are designing a binary classifier with limited labeled data. The signal ma...
Track Success and Guardrail Metrics for Push Notifications
Track Success and Guardrail Metrics for Push Notifications You are designing and evaluating a new push-notification feature for a travel-recommendatio...
Calculate Profitability and Evaluate Partnership for Credit Card Portfolio
Calculate Profitability and Evaluate a Partnership for a Credit Card Portfolio You are analyzing a mature credit-card portfolio to assess current prof...
Estimate Population Mean and Conversion Rate Accurately
Estimate Population Mean and Conversion Rate Accurately You are asked a series of statistical inference questions covering hypothesis testing, confide...
Determine Probability of Shared Videos in Recommendations
Meta statistics and product prompt on video recommendation overlap, covering combinations, probability of shared videos, expected intersection size, s...
Evaluate Factors Before Renewing TV-Series Contracts
TV-Series Renewal and Divestiture Analysis You are advising a CEO on whether to renew a two-year contract for two TV series: - The Analyst (Series A) ...
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 ...
Compute unmatched parentheses length
This question evaluates string-processing skills and understanding of parentheses matching and cancellation, focusing on linear-time sequence analysis...
Design coding platform with global leaderboard
This question evaluates proficiency in scalable distributed systems and system design, including real-time ranking algorithms, data modeling, API desi...
Find top-paid employee per department
Tables Assume the company stores employee compensation by department assignment. employee_dept_salary - employee_id INT - employee_name VARCHAR - depa...
Explain motivations and background for hedge fund role
Behavioral HR Screen: Data Scientist at a Hedge Fund (RCM) Prompt Give a concise self-introduction, then cover the following: 1. Academic background, ...
Refactor rock–paper–scissors for config and ties
Refactor an existing Rock–Paper–Scissors tournament with three robot players so that the number of rounds is configurable and the system also tracks t...
Explain a resume project end-to-end
End-to-End Project Walkthrough (Technical Screen — Software Engineer) Prompt Walk me through one project on your resume end-to-end. Please cover 1. Pr...
Implement queue-based rate limiter with multi-key limits
Implement a rate limiter with method allow(timestamp) that returns true if a request is allowed under a limit of K requests per rolling window W milli...
Assess LLMs for fraud detection
LLMs in Fraud Detection: Near-Term vs. Long-Term Roles Context You are designing fraud detection for a large-scale digital payments platform with: - R...
Explain core ML concepts and design choices
ML Fundamentals — Interview Questions Instructions Answer the following five ML fundamentals questions. Use precise definitions, equations, and concis...
Design school-to-guardian messaging with acknowledgments
System Design: Guardian Acknowledgement Messaging Platform Context Design a system that enables school staff to send messages to students' guardians, ...
Design A/B testing platform
Design an A/B Testing Platform (Architecture + Experiment Science) Context You are designing an A/B testing platform for a large-scale consumer web/mo...