Top 31
Prep plan
Updated weekly · Last refresh Aug 30

Fractal GenAI Engineer Interview Questions

The questions to prepare for a Fractal GenAI Engineer interview. Questions from real interview reports rank first. Updated weekly.

31questions
~4htotal time
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1
Generative AI & LLMsStart here. 12 questions · ~96 min
Reduce Hallucinations in LLM AnswersEasy

Explain LLM hallucination and give three practical ways to reduce it using grounding, prompting, and evaluation.

HallucinationPrompt EngineeringRAGFractal
Prompt Engineering and RAG BasicsMedium

Explain prompt engineering and RAG, how they differ, and when each is useful for improving LLM answer quality.

Vector SearchPrompt EngineeringRAGFractal
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2
Model Evaluation3 questions · ~24 min
Improve Model AccuracyMedium

Approach for improving a model's accuracy by checking errors, features, and tuning choices.

Hyperparameter TuningCross-ValidationAccuracyFractal
Benchmarking Sentence Transformers for RetrievalHard

Tests your ability to design retrieval benchmarks and interpret retrieval metrics.

PrecisionAUC-ROCRecallFractal
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3
NLP5 questions · ~40 min
Explain a RAG SystemMedium

Explain how RAG combines retrieval and generation to produce grounded answers from a document collection.

Vector SearchLanguage ModelsPrompt EngineeringFractal
Contextual vs Static Word EmbeddingsMedium

Assesses your ability to explain embedding behavior and implications for retrieval and generation.

Language ModelsWord EmbeddingsTokenizationFractal
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4
System Design3 questions · ~24 min
Real-Time Generative Recommendation SystemHard

Tests end-to-end system design for low-latency GenAI-driven recommendations.

RetrievalModel ServingRecommendation SystemsFractal
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5
Behavioral & Leadership6 questions · ~48 min
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6
More topics2 questions · ~16 min
The finish line: interview-readyComplete all 31 questions to finish this plan.