Ericsson Data Scientist Interview Questions
The questions to prepare for a Ericsson Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate Spectrum account usage and 7-day rolling averages with PostgreSQL window functions.
EricssonRank regions by completed network downtime for each month and return the top three regions per month.
EricssonHHolcimUse a scalar subquery and aggregation to find Ericsson trainees whose grades exceed the class average.
EricssonCompare two models using cross-validation and decide whether the performance gap is meaningful.
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Diagnose a below-expectations product metric drop using decomposition, guardrails, and experiment checks.
EricssonExplain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
EricssonDetermine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.
EricssonExplain practical strategies for handling missing values in a supervised learning workflow, from diagnosis to modeling and validation.
EricssonDesign a recommendation and ranking system that handles cold start for both new users and new items without hurting feed quality.
EricssonCompare batch and streaming data processing, including when each fits best in a pipeline.
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