Deutsche Telekom Data Scientist Interview Questions
The questions to prepare for a Deutsche Telekom Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Use joins, conditional aggregation, and ROW_NUMBER to find the three highest-churn Deutsche Telekom products in each region.
Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.
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InformaticaRewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.
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EnergyHubTests knowledge of threats to validity and how to prevent biased experiment outcomes.
Evaluates NLP tooling knowledge and ability to communicate a concrete modeling project.
Tests system design skills for streaming analytics and large-scale data processing.
Assesses understanding of embeddings and practical evaluation of generative AI systems.
Evaluates structured troubleshooting for funnel metrics and measurement issues.
Evaluates statistical rigor for experiment validation and decision readiness.
Evaluates KPI design and metric selection tied to product success.
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