The video tutorial discusses the structure of a neural network, focusing on the use of linear activations in all layers except the output layer, which uses a sigmoid activation. It explores the variability in the number of neurons in hidden layers and poses the question of whether such a model can still be considered a neural network. The exercise encourages viewers to think critically about the definition and characteristics of neural networks.

What happens to the input features as they pass through the layers of a neural network?

How do the number of neurons in hidden layers compare to the output layer in a neural network?

Explain the significance of having linear activations in all hidden layers except the output layer.

Discuss whether a model with linear activations everywhere except the last layer can still be classified as a neural network.

What is the role of the output layer in a neural network with linear activations in the hidden layers?