Ericsson Data Scientist Interview Questions
The questions to prepare for a Ericsson Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Determine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.
EricssonCompare two models using cross-validation and decide whether the performance gap is meaningful.
EricssonExplain practical strategies for handling missing values in a supervised learning workflow, from diagnosis to modeling and validation.
EricssonInvestigate why a key KPI moved the wrong way after a product change and separate signal from noise.
EricssonAssesses your ability to perform practical data analysis using spreadsheets.
EricssonUse a scalar subquery and aggregation to find Ericsson trainees whose grades exceed the class average.
EricssonRank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
WaymoUse a CTE, LEFT JOIN, and ROW_NUMBER to find each user's first Chime feature touch after signup.
Asana
ChimeDesign a recommendation and ranking system that handles cold start for both new users and new items without hurting feed quality.
EricssonExplain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
EricssonCompare batch and streaming data processing, including when each fits best in a pipeline.
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