Top 35
Prep plan
Updated weekly · Last refresh Oct 17

T-Mobile AI Engineer Interview Questions

The questions to prepare for a T-Mobile AI Engineer interview. Questions from real interview reports rank first. Updated daily.

35questions
~6htotal time
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1
System DesignStart here. 8 questions · ~84 min
Design an Agentic FlowHard

Design an agentic flow for an unspecified team use case, including orchestration, tools, serving, evaluation, and failure handling.

agent workflowsagentic systemsagent designT-Mobile
System Design: Model Context ProtocolHard

Explain MCP and how it standardizes secure connections between AI agents and external tools, resources, and prompts.

agent workflowsbackend integrationauthorizationT-Mobile
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2
Coding7 questions · ~74 min
Implementing a Basic Neural NetworkHard
Practice

Implement a deterministic one-hidden-layer neural network with sigmoid activation and batch backpropagation for binary classification.

Neural NetworksArraysMatrixT-Mobile
Reverse a Linked ListEasy
Practice

Reverse a singly linked list in place using pointer manipulation.

RecursionLinked ListsT-Mobile
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3
Generative AI & LLMs5 questions · ~53 min
Investigate Poor LLM Answer QualityMedium

Diagnose why a customer-facing LLM assistant is underperforming, using eval-first debugging across retrieval, prompting, safety, latency, and cost.

HallucinationPrompt EngineeringLLM EvaluationT-Mobile
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4
Machine Learning5 questions · ~53 min
Feature Selection in Supervised LearningMedium

Explain a practical approach to feature selection, including filtering, embedded methods, and validation against overfitting.

Feature EngineeringDeep LearningSupervised LearningT-Mobile
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5
Behavioral & Leadership8 questions · ~84 min
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6
More topics2 questions · ~21 min
Evaluate a Churn ModelMedium

Explain which metrics matter for evaluating a churn model and how to choose them based on retention costs and business goals.

F1 ScorePrecisionAUC-ROCT-Mobile
Choosing Model Evaluation TechniquesEasy

Explain how you evaluate models using the right metrics, validation strategy, and error analysis for the problem.

PrecisionAccuracyRecallT-Mobile
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