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Module 1 Answers

Question 1)Which of the following platforms does Swift NOT run natively on?

• Linux
• Darwin
• Windows
• None of the above

Question 2 )What kind of IBM Cloud account doesn’t require payment information and doesn’t expire?

• Trial
• Lite
• Pay-as-you-go

Module 2 Answers

Question 1 )Which of the following companies did Chris Lattner work at after Apple?

• IBM
• Microsoft
• Google
• Amazon
• Tesla

Question 2) What kind of programming language is Swift?

• Interpreted
• Compiled to machine code
• Compiled to byte code
• Transpiled

Question3)For how many years was Swift in development before it was released to the public?

For how many years was Swift in development before it was released to the public?

4

Question 4) Which HTTP server for Swift will this course use?

• Perfect
• Kitura
• Swifter
• Vapor

Module 3 Answers

Question 1)How is the tic-tac-toe board stored?

• Row-major format
• Column-major format

Question 2)The “minimax” function returns the best move to take for a board state.

• True
• False

Question 3)Why does our implementation of Minimax keep track of the depth of the tree?

• Stop at a certain depth
• Memoize game states
• Take into account the “straightforwardness” of moves

Question 4)If minimax started from a blank board and had to calculate the best possible move, how many board states would it evaluate? For the sake of mathematical simplicity, assume the board must be filled completely to be considered “over” – players cannot win.

• 9!
• 9^2
• 9^9
• 9*9

Module 4 Answers

Question 1)The cartpole game is what kind of problem?

Inverted Pendulum

Question 2)Why do we only train the network with the top 30% of episodes?

• To reduce training time with fewer samples
• To improve network performance with better samples

Question 3)The @differentiable function decorator is an example of an implementation of what technology/technique?

Data Structures

Question 4) OpenAI Gym…

• Provides easy-to-use game enviroments to test RL agents
• Ships with RL algorithms to use as agents

Module 5 Answers

Question 1)Which framework did we use to enable Swift to host HTTP servers?

Kitura

Question 2) Which swift file defines dependencies and other package details?

Package.swift

Question 3) The implementation of the 2048 game logic is made fast by:

• Using bitboards
• Pre-calculating moves and scores for rows
• Multi-threading

Question 4) Monte Carlo Tree Search is…

• Stochastic
• Guaranteed to always give the correct answer

Final Exam

Question 1 )Why would you want to use a single language, Swift, over many languages, each specialized for a certain task?

• It’s easier to maintain a codebase written in a single language.
• Swift is an expressive, performant, and open source language backed by a large company (Apple).
• It’s slow to facilitate communication between components in different languages.
• It reduces the amount of “reinventing the wheel” required across a codebase.

Question 2) Classes are passed by reference, and structs are always, indiscriminately passed by value.

• True
• False

Question 3 )Which tier(s) of IBM Cloud require payment information on file?

• Lite
• Trial
• Pay-as-you-go

Question 4 )Does Minimax plays perfectly all the time? If so, why?

• It’s trained on a lot of game data and learns how to play perfectly.
• It brute forces a solution based off of the rules of the game, and all possible future situations.
• It’s provided optimal heuristics.
• It doesn’t always play perfectly.

Question 5) A computed property is…

• A variable within a struct/class/enum.
• A function within a struct/class/enum that’s accessed like a property.

Question 6) Why is Reinforcement Learning important?

• It’s more accurate than other training methods.
• It can learn by trial and error.
• It doesn’t require as much data to learn from.
• It can play games.

Question 7 )What are some reasons Swift for TensorFlow is special?

• Swift now has a wrapper around TensorFlow, enabling machine learning development.
• Swift for TensorFlow can automatically differentiate complex functions.
• Swift for TensorFlow can optimize complex tensor operations.

Question 8)For what reasons did we implement monte carlo tree search in a time-bounded manner?

• To reduce the amount of time the algorithm takes to search.
• To search game states more if they’re closer to the end of a game.
• To make MCTS more accurate.
• To distribute the algorithm across threads.

Question 9) Why is Minimax penalized for looking at moves deeper into the game tree?

• To improve performance by looking at a more shallow game tree.
• So Minimax takes into account how straightforward a move is.
• To make Minimax more accurate.

Question 10) Why is Minimax penalized for looking at moves deeper into the game tree?

• To improve performance by looking at a more shallow game tree.
• So Minimax takes into account how straightforward a move is.
• To make Minimax more accurate.

Conclusion

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