Let's examine our knowledge of autoencoders by answering the following questions:

1. What are autoencoders?
2. What is the objective function of autoencoders?
3. How do convolutional autoencoders differ from vanilla autoencoders?
4. What are denoising autoencoders?
5. How is the average activation of the neuron computed?
6. Define the loss function of contractive autoencoders.
7. What are the Frobenius norm and Jacobian matrix?