Linkedin Data Scientist Interview Questions
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Estimate Redesign Impact Using Propensity Score Matching
Scenario A mobile app has been redesigned. Adoption is voluntary: users choose to upgrade to the new version over time. The team needs to estimate the...
Diagnose Job-Application Decline: Funnel Stages and KPIs Analysis
Diagnostic Case: Drop in Job Applications Context You are a data scientist at a large job‑search platform. The primary metric "job applications submit...
Measure Success of New B2B Product
Scenario A new LinkedIn B2B product has launched. Leadership wants to understand whether it adds value and what its growth potential is. Assume a typi...
Identify and Flag Bot Traffic in Online Forum
PVE +----------+-----------+ | memberId | timestamp | +----------+-----------+ | 101 | 169100123 | | 102 | 169100225 | | 101 | 16910030...
Identify Top Contributors by Recent Post Count
posts +----+---------+---------------------+ | id | user_id | created_at | +----+---------+---------------------+ | 1 | 101 | 2023-09-01...
Measure Causal Impact of Self-Selected App Redesign
Measuring Causal Impact of an Opt-in Mobile App Redesign Context A mobile app ships a redesigned UI as a new version. Users can choose to upgrade (opt...
Diagnose Job Application Decline: Funnel Analysis and Segmentation
Diagnosing a Sharp Drop in Job Applications Scenario A recruiting platform observes a sudden decline in the Job Applications metric. Assumptions and C...
Design Experiments for Email Campaign & Messaging Update
Experiment Design for Concurrent Email Campaign and New Messaging Feature Context: Marketing will run an email campaign at the same time Product ships...
Improve Profile Completion Rate
Increasing LinkedIn Profile Completion — Analytics & Experimentation (Onsite) Context Profile completeness affects members' visibility in search, qual...
Assess LinkedIn Newsfeed Health
Evaluate the Health of LinkedIn's Newsfeed Context You are assessing the health of LinkedIn's Newsfeed (the personalized, scrollable list of posts). A...
Test If Initial Video Uploads Are Shorter Than Later Ones
Hypothesis Test: Are Users’ First Video Uploads Shorter? Context You are given event-level data for a video-sharing product. Each record represents a ...
Resolve Conflicting A/B Test Results in Cities
A/B Test Paradox Across Two Cities Scenario You ran an A/B test in two geographies (City X and City Y). Within each city, variant A outperforms varian...
Analyze Trends to Diagnose Decline in Job Applications
Diagnose a Week-over-Week Drop in Job Applications Scenario A job marketplace observes that its daily application count has declined week-over-week. T...
Evaluate 'Job You May Be Interested In' Recommender
LinkedIn Jobs Recommender Upgrade — Metrics, Experiment Design, Powering, and Diagnostics Context LinkedIn is upgrading the algorithm that recommends ...
Identify Sales Professionals
Classifying Sales Professionals on LinkedIn Scenario You are tasked with building a machine learning system that automatically classifies LinkedIn mem...
Single Queue vs Multiple Queues — Service Design
Bank Branch Queue Design: Single Line to c Tellers vs c Independent Lines Context and assumptions for comparability: - Arrivals are approximately Pois...
[SQL] Job Ad Metrics with Applicant Filter
Job Ad Metrics Analysis Task Table Structure Table: job_activity job_id INT candidate_id INT activity_type VARCHAR -- can be 'view' or 'apply' Requi...
Predict Impact of 'Online Indicator' Feature
LinkedIn Messaging: Online Presence Indicator — Analytics Design Context LinkedIn plans to display an online presence indicator (for example, a green ...
Device Status without Timestamps
Table: article_views article_id INT author_id INT viewer_id INT view_dt DATE Count authors who have never viewed any of their own articles. On 20...
One of the most comprehensive LinkedIn DS Product Cases!
LinkedIn Profile Completion: Measurement, Diagnosis, and Improvement Context: You are a Data Scientist working on LinkedIn's Profile experience. "Prof...