Viber Data Scientist Interview Questions
The questions to prepare for a Viber Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.
ViberFramework for using product data to identify and prioritize the user problem that should be solved first.
ViberExplain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.
ViberEvaluates reasoning in probability and proportional processes.
ViberAggregate daily app events to report total events and distinct active users for a date range.
Viber
PoshmarkCalculate each user's seven-day rolling average of daily events using PostgreSQL window functions.
BounteousFFreelancerBBoston Tech IndiaCalculate monthly customer retention by acquisition campaign and cohort using PostgreSQL aggregations and date-based analysis.
Remitly
Amazon Advertising
MUFGAssess whether a model has real predictive power using validation performance, calibration, and threshold behavior.
ViberDiagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
ViberDesign a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.
ViberApproach for maintaining data quality and integrity across ETL pipelines.
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