Explain What a Neural Network Is and How It Learns
Company: Axq Capital
Role: Software Engineer
Category: Machine Learning
Difficulty: medium
Interview Round: HR Screen
Overview: Explain what a neural network is: how units and layers turn weighted inputs into outputs, why non-linear activations are essential, and how the weights are learned with a loss function, backpropagation, and gradient descent. It tests core machine learning fundamentals, including overfitting and when simpler models are the better choice.