I applied through other source. The process took 2 days. I interviewed at Fractal (Apex, NC) in Jul 2025
Interview
I had a one-hour AI-based interview focused heavily on the machine learning domain. The questions covered a range of ML algorithms, their practical applications, advantages and limitations, and how to choose the right model for specific scenarios. The interviewer also assessed my understanding of model evaluation metrics, feature engineering, optimization techniques, and real-world deployment challenges. It was a mix of conceptual, problem-solving, and scenario-based questions, aimed at gauging both my theoretical knowledge and practical experience in AI/ML.
Interview questions [1]
Question 1
Can you explain the theoretical differences between LoRA and QLoRA, and provide a detailed, step-by-step guide — including code — for fine-tuning a large language model with each approach, highlighting trade-offs in performance, memory efficiency, and deployment considerations?