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/B Test for Search Feature Effectiveness
Design A/B Test for Search Feature Effectiveness A/B Testing a Search Button and Measuring Search Quality Scenario A product team wants to evaluate a ...
Evaluate Dasher Initiatives with A/B Testing and Metrics
Evaluate Dasher Initiatives with A/B Testing and Metrics Scenario You are the product/analytics lead for a food-delivery marketplace. You must evaluat...
Discuss Résumé Highlights and Past Work Experience.
Discuss Résumé Highlights and Past Work Experience. Behavioral HR Screen — Data Scientist (45 minutes) Setup A 45-minute conversation with a current e...
Derive Probability of Even Sum in Bernoulli Trials
Derive Probability of Even Sum in Bernoulli Trials Probability Puzzles: Parity and Runs Context You are given two independent probability problems com...
Design Metrics Framework for Adobe Express Performance Evaluation
Design Metrics Framework for Adobe Express Performance Evaluation Metric Framework for Adobe Express Performance Context Adobe Express is a freemium c...
Evaluate K-Fold Cross-Validation for Model Selection
Evaluate K-Fold Cross-Validation for Model Selection Model Selection and Validation for a New Feature Launch You are selecting and validating predicti...
Calculate Probability and Statistics for Dice Roll Outcomes
Calculate Probability and Statistics for Dice Roll Outcomes Dice Rolls and the Binomial Model Scenario A casino analyst models dice rolls to understan...
Diagnose Sudden Drop in Credit-Card Approval Rate
Diagnose Sudden Drop in Credit-Card Approval Rate Fraud Risk: Sudden Drop in Credit Approval Rate Context You are the on-call Data Scientist supportin...
Boost Google Workspace Chat Usage with Strategic A/B Testing
Boost Google Workspace Chat Usage with Strategic A/B Testing Scenario Google Workspace Chat adoption is low, and leadership asks for a data-driven pla...
Design an Automated Home-Price Valuation Model
Design an Automated Home-Price Valuation Model Scenario You are building an automated house-price valuation service for a real-estate platform. Questi...
Design an ads audience targeting system
This question evaluates skills in large-scale system design, data modeling for massive audience membership, low-latency lookup mechanisms, and operati...
Explain C++ Inline Semantics and Trade-Offs
Explain C++ Inline Semantics and Trade-Offs Explain what the C++ inline keyword means, how that differs from a compiler actually substituting a functi...
Design a Digital Asset Custody Service
Prepare for a Anchorage Digital system design interview about design a digital asset custody service. This question focuses on requirements, architect...
Build a Heart Disease Baseline
You are given a tabular dataset for predicting whether a patient has heart disease. The dataset contains a binary target column such as has_heart_dise...
Analyze Profile Traffic Drop
This question evaluates a data scientist's competency in product-metrics analysis, instrumentation validation, segmentation and attribution, and causa...
Design a group chat system
Design a WhatsApp-like group chat system. Core features: - 1:1 and group conversations - Send/receive text messages (assume small payloads) - Group me...
Describe a bug you owned end-to-end
Behavioral Question Tell me about a time you personally found and fixed a bug. Cover: - What the bug was and how it was discovered - How you narrowed ...
Diagnose KPI anomaly and evaluate promotion/A-B test
Diagnose KPI anomaly and evaluate promotion/A-B test You are a Data Scientist supporting a TurboTax product team. You are asked to handle three relate...
Compute Top-K word frequencies under a path
Compute Top-K word frequencies under a path Given a filesystem path that may contain nested subdirectories and files, compute the top K most frequent ...
Diagnose failures via SSH and large logs
Diagnose failures via SSH and large logs Troubleshooting Large Logs Over SSH and Designing Centralized Logging Context You are on-call for a productio...