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MC Qu. 12-01 How many copies of the ledger are... How many copies of the ledger are in a blockchain network with 4 participating nodes? Multiple Choice Four TWO One Three MC Qu. 12-11 Which of the following best... Which of the following best describes machine learning? Multiple Choice Machine learning is a technique by which a software model is trained using data Machine learning uses complex, multi-layer neural networks. Machine learning involves a computer's ability to learn from specific instructions None of these choices is correct MC Qu. 12-15 Which of the following is not a... Which of the following is not a metric used to assess the performance of a model? Multiple Choice Precision Reliability None of these choices is correct. Recall. MC Qu. 12-02 What is the major difference between... What is the major difference between the proof of authority (PoA) consensus algorithm and proof of work (PoW) consensus algorithm? Multiple Choice For PoA, all participants must compete to gain the consensus as the validator. For Pow. smaller number of validators is required. For PoA validator identities are known For Pow, only a select group of participants in the network is creating blocks MC Qu. 12-13 If the Al application predicts three... If the Al application predicts three classifications, how may rows would be in the confusion matrix to summarize results? Multiple Choice Exactly 2 Only 1 Two or more Exactly 3 MC Qu. 12-08 Which of the following is the best... Which of the following is the best description of artificial intelligence? Multiple Choice O Sophia the robot developed by Hanson Robotics. A broad field in data analytics. The use of technology to support decision making. Intelligence exhibited by machines rather than humans