Explain bias–variance, overfitting, and vanishing gradients
Company: Pinterest
Role: Machine Learning Engineer
Category: Machine Learning
Difficulty: medium
Interview Round: Technical Screen
Quick Answer: This question evaluates understanding of core machine learning fundamentals—specifically the bias–variance tradeoff, overfitting detection and mitigation, and the vanishing gradient phenomenon in deep networks—testing competencies in model generalization, diagnostic reasoning, and training dynamics.