Top 20
Prep plan
Updated weekly · Last refresh Aug 30
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Deutsche Telekom AI Engineer Interview Questions

The questions to prepare for a Deutsche Telekom AI Engineer interview. Questions from real interview reports rank first. Updated weekly.

20questions
~3htotal time
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1
System DesignStart here. 7 questions · ~56 min
Design an LLM Serving PlatformHard

Design an LLM serving system that balances latency, cost, scalability, and safety for production traffic.

Cold StartFeature StoreModel ServingDDeutsche Telekom
Design a Multi Agent Coordination SystemHard

Design the infrastructure for a multi-agent system where agents communicate, coordinate work, and recover from non-deterministic failures.

Feature StoreModel ServingRecommendation SystemsDDeutsche Telekom
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2
Generative AI & LLMs4 questions · ~32 min
Evaluate an LLM SystemMedium

Explain how to evaluate a generative model using offline and online methods, with attention to hallucination, product metrics, and experiment design.

HallucinationPrompt EngineeringLLM EvaluationDDeutsche Telekom
Designing a RAG PipelineHard

Tests your ability to design retrieval, grounding, and generation components for LLM applications.

pipeline designRAGDDeutsche Telekom
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3
Machine Learning5 questions · ~40 min
Feature Engineering for Sparse DataMedium

Explain how to engineer features for high-dimensional sparse data while controlling overfitting, dimensionality, and training cost.

data preprocessingFeature Engineeringsparse datasetsDDeutsche Telekom
Model Architecture Trade-offsMedium

Tests your ability to choose architectures that balance latency, accuracy, and resource constraints.

Trade-offsDDeutsche Telekom
Reducing Latency for High TrafficHard

Tests your skills in performance optimization for real-time ML serving at scale.

latencyDDeutsche Telekom
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4
Behavioral & Leadership3 questions · ~24 min
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5
More topics1 question · ~8 min
Embeddings and Vector SearchMedium

Tests your understanding of embedding pipelines, indexing, and similarity search for recommendations.

Vector SearchDDeutsche Telekom
The finish line: interview-readyComplete all 20 questions to finish this plan.