Santander Holdings USA AI Engineer Interview Questions

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysSortingSantander Holdings USA

Build an imbalanced binary classifier for payment fraud detection using cost-sensitive learning, threshold tuning, and precision-recall evaluation.

Cross-ValidationFeature EngineeringSupervised LearningSantander Holdings USA

Design a grounded document Q&A system and explain how vector search improves retrieval quality, latency, and hallucination control in RAG.

Vector SearchPrompt EngineeringRAGSantander Holdings USA

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

HallucinationPrompt EngineeringLLM EvaluationSantander Holdings USA

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

Cold StartFeature StoreModel ServingSantander Holdings USA

Tests evaluation methodology and ability to balance model quality with real-time constraints.

latencyAccuracyModel MetricsSantander Holdings USA