Data Scientist Analytics & Experimentation Interview Questions
Practice 895 real Analytics & Experimentation interview questions for Data Scientist roles. From companies including Meta, Capital One, DoorDash, Uber, TikTok.
"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 and analyze a group-calls experiment
You are considering launching Group Video Calls. Answer all parts precisely; justify choices with pros/cons and formulas where relevant. 1) Clarify CT...
Evaluate brand ads effectiveness on social media causally
Hypothesis: 'Social media (e.g., Facebook) is not effective for brand advertising compared with other channels.' You have historical multi-channel dat...
Run a clean A/B test for autocomplete
This question evaluates experimental-design and causal-inference competency for online A/B testing of ML-ranked autocomplete, covering metric formulat...
Increase posts receiving one comment
This question evaluates a data scientist's competency in product analytics and experimentation, specifically metric definition and guardrails, segment...
Measure and mitigate notification spam
This question evaluates a data scientist's competency in defining precise success and guardrail metrics, designing counterfactual-aware experiments an...
Compute duration and stopping rules correctly
Experiment Runtime Planning: Same‑Day Delivery Attach Rate You are planning an A/B test on the same‑day delivery attach rate (the proportion of eligib...
Design a creator posting-frequency experiment
This question evaluates experimental design and causal inference competencies for a Data Scientist, including precise metric definition, randomization...
Diagnose a sudden KPI drop and validate causes
A core KPI (comments_per_DAU) suddenly drops materially. Outline a structured root-cause analysis and validation plan. a) Scoping and sanity: Quantify...
Design and validate ad model launch
You are on the Ads team and just trained a new ad recommendation model meant to replace the current model in production. Design a rigorous plan to dec...
Define success metrics beyond time spent
This question evaluates a data scientist's competency in product analytics and experimentation, focusing on metrics design, cohort-based retention mea...
Diagnose sustained drop in executed trades
Brokerage Analytics Troubleshooting: Trades Per Active User Down 22% Context You are the analyst for a brokerage product that spans onboarding through...
Prove conversion ads value via incrementality
This question evaluates a candidate's competency in causal inference and experimentation design for advertising measurement, covering metrics and attr...
Evaluate and test a Top Dasher program
This question evaluates skills in causal inference, experiment design under interference, decision framework development, anti-gaming and selection-bi...
Design an A/B test for promo-targeting models
Experiment Design: Compare Two Ranking Models (M1 vs M0) for $5 Promotions Context You have two models, M0 (current) and M1 (new), that rank users for...
Design experiments and observational alternatives
This question evaluates causal inference, experimental design, metric definition and measurement, power analysis, segmentation, and observational stud...
Diagnose and decide on watch-time drop
Hulu iOS Homepage Ranking Model Rollout: Causal Read and Decision Within 48 Hours Context - On 2025-08-25, a new homepage ranking model was shipped to...
Design a quasi-experiment for FHFA policy
Causal Impact of FHFA's April 15, 2024 Multifamily Underwriting Tightening Context On April 15, 2024, FHFA tightened underwriting standards for multif...
Analyze regression to mean in heavy-tailed shares
Cohort Dynamics of a Right-Skewed Daily Shares Metric Context - You have a right-skewed metric: daily shares per user, with a long tail. - On Day 1, y...
Separate demand from supply for jeans
Scenario You are a Data Scientist at a multi-category marketplace. The Jeans category is underperforming. You must diagnose whether the primary bottle...
Investigate SMS delivery-rate drop at Attentive
Triage and Validation Plan: US SMS Delivery-Rate Drop Context On March 10 from 20:00–22:00 ET, the US SMS delivery rate (Delivered/Attempted) dropped ...