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."
Identify Top-3 Users by Recent Total Spend
Users +----+-------+-------------+ | id | name | joined_date | +----+-------+-------------+ | 1 | Alice | 2023-01-02 | | 2 | Bob | 2023-02-14 |...
Design A/B Test for Cost-Per-Conversion Efficiency Analysis
Design A/B Test for Cost-Per-Conversion Efficiency Analysis Multi-Arm A/B Test: Comparing Cost-Per-Conversion Across Channels Scenario You need to com...
Track Metrics to Measure Push Notification Quality
Track Metrics to Measure Push Notification Quality Scenario A consumer mobile app sends push notifications to drive user engagement. You need to evalu...
How to Update Bayesian Model for Concept Drift?
How to Update Bayesian Model for Concept Drift? Beta–Binomial CTR Model: Prior, Likelihood, Posterior, Smoothing, Intervals, and Drift Context You are...
Describe Handling Conflict in Team Projects and Collaboration
Describe Handling Conflict in Team Projects and Collaboration Behavioral & Leadership (Onsite) — Data Scientist Scenario You are interviewing for a Da...
Identify P-Value Limitations and Complementary Approaches
Identify P-Value Limitations and Complementary Approaches A/B Testing: Limits of P-values and Better Decision Practices Scenario Your team is running ...
Investigate Causes of Driver WOW Score Drop
Investigate Causes of Driver WOW Score Drop Investigating a 10% QoQ Drop in Driver WOW (Satisfaction) Context Assume WOW is a standardized driver sati...
Estimate Treatment Effects Using PSM, DiD, and DML Methods
Estimate Treatment Effects Using PSM, DiD, and DML Methods Causal Impact of Marketing Campaigns: PSM, DiD, Synthetic Control, and DML Scenario You hav...
Explain Statistical Outputs to Non-Technical Stakeholders
Explain Statistical Outputs to Non-Technical Stakeholders A/B Test Dashboard Interpretation and Core Statistics Concepts Scenario You are reviewing an...
Explain MySQL to MS SQL Server query syntax differences.
transactions | id | user_id | amount | txn_date | |----|---------|--------|----------| | 1 | 1001 | 25.00 | 2023-07-01 | | 2 | 1002 | 40.00 ...
Design Experiments for Causal Inference in Marketing Analytics
Design Experiments for Causal Inference in Marketing Analytics Technical Phone Screen: Marketing Experiments and Causal Inference Prompt You are inter...
Transform Customer Feedback into Valuable Product Enhancements
Transform Customer Feedback into Valuable Product Enhancements Behavioral Case: Turning Customer Feedback into Product Improvements Scenario You are i...
Calculate Probability of Honest and Relevant Chatbot Answers
Calculate Probability of Honest and Relevant Chatbot Answers Chatbot Evaluation: Honesty and Relevance Scenario You are evaluating a customer-service ...
Identify Unsupervised Techniques for Detecting Fraudulent Transactions
Identify Unsupervised Techniques for Detecting Fraudulent Transactions Unsupervised Fraud Detection: Modeling and Evaluation Without Labels Scenario Y...
How to handle huge inputs?
In a coding interview, after solving an in-memory algorithmic problem, the interviewer asks: "What would you do if the input were extremely large?" Gi...
Implement Time-Aware GPU Credit Ledger
This question evaluates the ability to design efficient data structures and algorithms for time-aware resource accounting, including handling overlapp...
Implement a Leaky Bucket Limiter
This question evaluates understanding of rate-limiting algorithms (leaky bucket), concurrent programming, time-based state management, and thread-safe...
Design chat and online chess
This question evaluates a candidate's ability to design large-scale, real-time consumer systems, testing competencies in scalable architecture, data m...
Reduce airport ride cancellations under causal constraints
Question You are a Data Scientist supporting an airport rides / airport pickups team at a ride-hailing marketplace. Airport pickups are operationally ...
Should you play a dice payout game?
Two players each roll a fair six-sided die once. - If you win (your roll > opponent’s roll), the opponent pays you $n. - If the opponent wins or it’s ...