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."
Highlight Background and Impactful Projects in Self-Introduction
Highlight Background and Impactful Projects in Self-Introduction Behavioral Prompt: Self-Introduction (Technical Phone Screen) Context You are at the ...
Evaluate Propensity Score Matching Alternatives and Diagnostics
Evaluate Propensity Score Matching Alternatives and Diagnostics Context You are reviewing an observational study that used Propensity Score Matching (...
Design A/B Test for Streaming Feature Network Effects
Design A/B Test for Streaming Feature Network Effects A/B Test Design With Potential Social-Network Spillovers (Streaming Platform) Context You are de...
Maximize Probability of Drawing Two Red Balls
Maximize Probability of Drawing Two Red Balls Optimize Two-Basket Allocation for Red-Red Draws Setup You have 100 red balls and 100 blue balls to dist...
Explain Statistical Concepts in A/B Testing and Corrections
Explain Statistical Concepts in A/B Testing and Corrections A/B Testing: p-values, Power, and Error Rates with Multiple Comparisons Context You are re...
Evaluate Marketing Campaign's Click-Through Rate Effectiveness
Evaluate Marketing Campaign's Click-Through Rate Effectiveness Scenario A campaign currently shows a click-through rate (CTR) of 4.2%. Leadership asks...
Evaluate Impact of Increasing Stranger Content in Feeds
Evaluate Impact of Increasing Stranger Content in Feeds Feed-Ranking Strategy: Friends vs. Stranger Content Background A personalized feed currently m...
Examine Data to Boost Instagram Purchases Effectively
Examine Data to Boost Instagram Purchases Effectively Increasing Instagram In‑App Purchases: Data, Experiments, and Trade‑off Decisions Scenario You a...
Differentiate P-value and Confidence Interval in Statistics
Differentiate P-value and Confidence Interval in Statistics Statistics Knowledge Check (Onsite Data Scientist) Task Explain core inferential statistic...
Identify Overlapping Sessions and Optimize Coverage
Identify Overlapping Sessions and Optimize Coverage Scenario During the technical screen, candidates must implement interval algorithms used in fraud-...
Choose Between Fine-Tuning and RAG for Client Chatbot
Choose Between Fine-Tuning and RAG for Client Chatbot Scenario You are building a client-facing chatbot that must answer questions grounded in the cli...
Evaluate Fake-Account Classifier with Precision and Recall Metrics
Evaluate Fake-Account Classifier with Precision and Recall Metrics Evaluating a Fake-Account Classifier in Production Scenario You have trained a mode...
Calculate Probability of Heads and Red Balls Drawing
Calculate Probability of Heads and Red Balls Drawing Quick-Fire Probability (CodeSignal-style) Context: Answer the following independent probability q...
Determine Conditions for Multiplying Event Probabilities in Statistics
Determine Conditions for Multiplying Event Probabilities in Statistics Scenario You are modeling multiple, distinct risk events in Coinbase Wallet (e....
Evaluate Campaign Lift with Predictive Analytics and Validation Strategy
Evaluate Campaign Lift with Predictive Analytics and Validation Strategy Evaluate Marketing Campaign Lift (Weekly SKU-Level, 3 Years) Context You have...
Design an Effective A/B Test for Algorithm Launch
Design an Effective A/B Test for Algorithm Launch Design an A/B Test for a New Mobile App Recommendation Algorithm Context A mobile app team plans to ...
Propose Innovative Ideas and Convince Others Effectively
Propose Innovative Ideas and Convince Others Effectively Behavioral Interview Prompts (Data Scientist, Phone Screen) Context You are interviewing for ...
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...
Assess Leadership Through Disagreement, Failure, and Risk Examples
Assess Leadership Through Disagreement, Failure, and Risk Examples Behavioral Leadership Deep-Dive (Data Scientist Onsite) Scenario A leadership-princ...
Design Experiment to Measure Airport Surge-Pricing Impact
Design Experiment to Measure Airport Surge-Pricing Impact Experiment Design: Causal Impact of Airport Surge-Pricing Push Notifications on Driver Suppl...