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Practice Exams:
[Midterm] [Final]

# CS256 Fall 2021Practice Final

To study for the final I would suggest you:

1. Know how to do (by heart) all the practice problems.
2. Go over your notes at least three times. Second and third time try to see how much you can remember from the first time.
3. Go over the homework problems.
4. Try to create your own problems similar to the ones I have given and solve them.
5. Skim the relevant sections from the book.
6. If you want to study in groups, at this point you are ready to quiz each other.

Here are some facts about the actual final:

1. It is comprehensive.
2. It is closed book, closed notes. Nothing will be permitted on your desk except your pen (pencil) and test.
3. You should bring photo ID.
4. There will be more than one version of the test. Each version will be of comparable difficulty.
5. It is 10 problems (3pts each), 6 problems will be on materials since the second midterm, 4 problems will be from the topics of the midterm.
6. Two problems will be exactly (less typos) off of the practice final, and one will be off of the practice midterm.

4. Explain how cross-validation can be done for a neural net model implemented in Python. Define regularization in NNs, give the formulas for L_1 and L_2 parameter regularization and say how we could specify them in Keras.