Pinterest Data Scientist Interview Questions
Preparing for Pinterest Data Scientist interview questions demands focused interview preparation across coding, product thinking, and experimentation. Pinterest’s DS loop typically blends practical SQL and Python problem-solving with statistical reasoning and product-metric case work, so expect questions that test your ability to extract and manipulate data, design and evaluate experiments, and translate analyses into product recommendations. ([interviewquery.com](https://www.interviewquery.com/interview-guides/Pinterest-Data-Scientist?utm_source=openai)) The process usually starts with a recruiter screen, moves to a technical phone or take-home assessment, and—if advanced—an onsite loop of domain, coding/SQL, statistics, and behavioral interviews; intern/new‑grad tracks sometimes use CodeSignal for initial screening. To prepare, rehearse live SQL and Python problems, review experiment design and key metrics, and craft concise project stories that show impact and tradeoffs. Practicing timed coding on collaborative pads and walking interviewers through your reasoning will be especially valuable. ([pinterestcareers.com](https://www.pinterestcareers.com/interviewing/?utm_source=openai)

"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."
Estimate a Launch Impact with Difference in Differences
Estimate a regional product launch effect with difference in differences when retrospective randomization is unavailable. Define the estimand, test pa...
Implement and Evaluate Pin Similarity in Python
You are asked to compare Pin similarity in Python. Begin by clarifying how a Pin is represented and what “similar” should mean. Then assume the interv...
Implement Bootstrap and Jackknife Estimates on a DataFrame
Implement bootstrap and jackknife uncertainty estimates for a statistic computed from a pandas DataFrame. Learn correct positional resampling, confide...
Size an Opportunity and Present It with Clear Visuals
Structure a data science case that sizes a business opportunity from partial information and presents it to senior decision-makers. Build top-down and...
Connect Probability, Experiment Sizing, and Bootstrap Inference
Connect Probability, Experiment Sizing, and Bootstrap Inference A product team wants a precise statistical readout for a billboard-style intervention....
Design and Interpret a Video Pin Experiment
A content platform wants to increase creation of video Pins. Design an experiment, then interpret the illustrative result table below and make a launc...
How would you evaluate a carousel launch?
This question evaluates a data scientist's skills in experimental design, product-metric specification, causal inference, and diagnostic analysis for ...
Evaluate Fresh Content and Video Experiments
Pinterest wants to improve the perceived freshness and engagement of the home feed. Answer the following interview questions: 1. Define a practical me...
Evaluate Carousel and Billboard Lift
This question evaluates experiment design, causal inference, metric definition, diagnostic analysis, and measurement validity within the Analytics & E...
How to evaluate a new Carousel feature
This question evaluates a data scientist's competence in experimentation design, measurement framework formulation, metric definition, and diagnostic ...
Diagnose CTR drop after recommendation launch
Experiment Diagnosis: Horizontal Recommendations Carousel on Home Context A new horizontal recommendations carousel was launched on the home page. In ...
Explain BLS vs CLS; compute t-stats
Part A — Concepts: Define Brand Lift Study (BLS) vs Conversion Lift Study (CLS) in ads measurement. List key bias/variance sources for each (e.g., non...
Measure Billboard Campaign Impact: Design, Bias, Test Strategy
Measure Billboard Campaign Impact: Design, Bias, Test Strategy evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistic...
Decide if ad load is optimized
Pinterest Home Feed Ad Load Optimization You are asked to design an analysis and experiment to determine whether the current home-feed ad load (ads pe...
Demonstrate leadership with concrete STAR examples
Behavioral & Leadership (Onsite) — STAR Examples With Metrics Provide succinct STAR-format examples (Situation, Task, Action, Result), with specific m...
Analyze survey with gender imbalance
Analyze survey with gender imbalance Scenario You ran a user survey to measure satisfaction with a new product feature. Each respondent reports: - gen...
Assess Cultural Fit and Self-Reflection in Hiring Process
Behavioral Interview: Cultural Fit and Self-Reflection In a Pinterest Data Scientist onsite loop, hiring-manager and cross-functional panels may use p...
Interpret A/B results for video-pin increase
A/B Test: Increasing Video Pins for New Users Context Pinterest ran an online controlled experiment on new users to increase the share of video pins i...
Design rigorous A/B test and causal analysis
Experiment Design and Causal Inference: Multi-part Problem Context: You are designing a high-traffic web A/B test on a binary conversion metric. Answe...
Recover causal effect without a control group
Post-hoc Causal Estimation After a Failed A/B Rollout Context An intern accidentally shipped a feature to 100% of eligible users for 5 consecutive day...