Question bank
4,310 interview questions, answered.
Reference answers, what the interviewer is really testing, how it is graded, and the follow-ups that come next.
Easy 3Medium 33Hard 7
Filters · onDifficulty, topic, company
43 questions
- 1Imagine you are a data scientist for Instagram. How would you balance ads and follower posts and how would you monitor its effectiveness.HardData·
Meta - 2Choose a meaningful metric to measure the success of launching bikes as a form of transport for Dashers.MediumData·
DoorDash - 3There's a YoY slowdown in transactions. How would you structure your analysis?HardData·
PayPal - 4Imagine you're a data scientist at Meta. There's been a sudden 10% drop in Facebook's daily post views. How would you investigate?MediumData·
Meta - 5What is the market size for driverless cars in 2025?HardDataProduct·
Google - 6Choose a product you like and explain how you would identify its competitors.MediumData·
Google - 7Imagine you are a data scientist for Netflix. How would you use data to decide whether a TV series is worth renewing?MediumData·
Netflix - 8How long would 100 cars stopped at a traffic light take to all pass the light?MediumDataProduct·
Revolut - 9Tell me about a project where you had to clean and organize a large dataset.MediumDataTechnical·
Anthropic - 10How would you convey insights and the methods used to a non-technical audience?MediumDataTechnical·
IBM - 11How would you determine if Facebook Messenger should introduce group calling?MediumData·
Meta - 12Given a feature data record (FDR), how would you detect anomalies in it?MediumData·
Airbus - 13How would you model the expected ROI of a new product launch?MediumData·
Anthropic - 14How many gas stations are there in California?MediumTechnicalData·
MasterClass - 15How would you reduce attrition in a team/organization?MediumDataProduct·
Revolut - 16Given an array of integers, print all subarrays that sum to zero.MediumCodingData·
Meta - 17Tell me about a time you used data to diagnose and solve a problem.MediumData·
ARM Holdings, Instacart - 18How would you visualize sales and customer usage?MediumData·
Amazon - 19Meta’s new app shows 25% drop-off at sign-up. How do you analyze this?MediumData
- 20Walk me through how you'd assess the success of a beta launch.MediumData
- 21Improving StudentsHardCodingData
- 22How do you handle joining data from different sources with inconsistent IDs?HardData
- 23You have three ideas for expansion but limited resources. How would you help prioritize them?MediumData
- 24You’re launching a new feature—how would you measure its strategic impact on growth?MediumData