AIS CH12 Multiple Choice

If a confusion matrix shows 25 TP, 5 FN, 1000 TN, and 5 FP, what is the recall ratio? (Round your answer to 2 decimal places.)

0.83

If a confusion matrix shows 46 TP, 6 FN, 500 TN, and 4 FP, what is the recall ratio? (Round your answer to 2 decimal places.)

0.88

If a confusion matrix shows 46 TP, 6 FN, 500 TN, and 4 FP, what is the precision ratio? (Round your answer to 2 decimal places.)

0.92

If a confusion matrix shows 46 TP, 6 FN, 500 TN, and 4 FP, what is the accuracy ratio? (Round your answer to 2 decimal places.)

0.98

If a confusion matrix shows 25 TP, 5 FN, 1000 TN, and 5 FP, what is the accuracy ratio? (Round your answer to 2 decimal places.)

0.99

What is a requirement of the proof of authority algorithm?

A few members have known identities.

Which of the following is not true with respect to artificial intelligence?

AI began in the 1990s.

Which of the following statements is false?

Bitcoin uses smart contract to specify the business rules.

Which of the following best describes the difference between artificial intelligence and machine learning?

Machine learning is a subset of AI.

Which of the following best describes machine learning?

Machine learning is a technique where a software model is trained using data.

Which of the following best describes unsupervised learning?

The training data only include input values.

Which of the following statement is false?

Because a distributed ledger exists in a blockchain network, a computer consisting of all transaction records may crash and cause the syncing issue in the blockchain network.

Which of the following is created mainly for cryptocurrency application?

Bitcoin

Which of the following best describes deep learning?

Deep learning involves complex, multilayer neural networks.

Which feature cannot be found in bitcoin?

Double spend

Which of the following statement is false?

Hyperledger is a public blockchain.

Which of the following best describes a confusion matrix?

It is a table summarizing the prediction results.

Which of the following is not part of the virtuous cycle of machine learning?

Model

Which of the following best describes artificial neural networks?

Neural networks consist of inputs, neurons or nodes, and outputs.

What information does a block in the Bitcoin network not contain?

None, a block contains all of this information.

Which of the following statements is true?

Smart contract was introduced in Ethereum.

Which of the following best describes reinforcement learning?

The model learns by trial-and-error.

Which of the following best describes supervised learning?

The training data contain input—output pairs.

Which of the following best describes semi-supervised learning?

The training data contain some missing labels or incomplete data.

Which of the following is not directly related to one of the five questions that machine learning/AI is best suited to answer?

Which business strategy will be most successful?

When we refer to smart contract in blockchain, we mean:

a piece of software code that can be executed or triggered by business activities.

A selected set of organizations may run a blockchain node separately for keeping the transaction records. Administrators from the organizations establish the access rights and permissions for each participant. This type of blockchain is often called:

consortium blockchain.

Ben goes to his bank to wire transfer $1,000 to his sister Jennifer. The role of the bank in this transaction is best described as:

middleman.

In the Ethereum network:

mining of Ether occurs at a constant rate.

If a confusion matrix shows 25 TP, 5 FN, 1000 TN, and 5 FP, what is the precision ratio? (Round your answer to 2 decimal places.)

0.83