1. Restricted Boltzmann Machines are based on directed graphs. (Yes | No)
No. RBM graphs are undirected, unsupervised, and memoryless, and the decision making is based on random calculations.
2. The hidden units of an RBM are generally connected to each other. (Yes | No)
No. The hidden units of an RBM are not generally connected to each other.
3. Random sampling is not used in an RBM. (Yes | No)
No. False. Gibbs random sampling is frequently applied to RBMs.
4. Is there a method to prevent gradients from vanishing in an RNN? (Yes | No)
Yes. When the gradient gets "stuck" around 0, for example, a ReLU function can solve this problem. It will force negative values to become 0 (or a fixed value in a leaky ReLU), and the positive values will not change.
5. LSTM cells never forget. (Yes | No)
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