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 weekly.

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SQL Ranking Functions Differences

Easy

Tests understanding of SQL ranking semantics for correct analytics results.

Data ManipulationRanking

DDeutsche Telekom

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Experiment Pitfalls to Avoid

Medium

Tests knowledge of threats to validity and how to prevent biased experiment outcomes.

experiment design

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Embedding and GenAI Evaluation

Medium

Assesses understanding of embeddings and practical evaluation of generative AI systems.

DDeutsche Telekom

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Framework for Conversion Drop

Medium

Evaluates structured troubleshooting for funnel metrics and measurement issues.

diagnostic framework

DDeutsche Telekom

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Aligning Analysis With Business Goals

Medium

Assesses ability to connect analytics work to business outcomes in Deutsche Telekom's context.

Data Analysisalignment

DDeutsche Telekom

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Validating A/B Test Results

Medium

Evaluates statistical rigor for experiment validation and decision readiness.

validation

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NLP Libraries and TransformersMedium

Evaluates NLP tooling knowledge and ability to communicate a concrete modeling project.

transformers

DDeutsche Telekom

Streaming Log Distribution System DesignHard

Tests system design skills for streaming analytics and large-scale data processing.

Stream Processingdata visualization

DDeutsche Telekom

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