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1.
Which of the following digital-signature algorithms is typically used in a blockchain?
2.
2. Only a group of pre-selected nodes can participate in the consensus process.
3. It is partially centralized.
4. Tampering a transaction is nearly impossible in a consortium blockchain.
Which of the following statements about a consortium blockchain is true:
1. All the records are visible to public and anyone can take part in the consensus process.2. Only a group of pre-selected nodes can participate in the consensus process.
3. It is partially centralized.
4. Tampering a transaction is nearly impossible in a consortium blockchain.
3.
2. It is a replication algorithm to tolerate Byzantine faults.
3. In PoW, each node of the network is required to calculate a hash value of the block header.
4. The PoW procedure is referred to as mining in Bitcoin.
Which of the following statements about PoW (Proof of Work) are true:
1. It is a consensus strategy used in the Blockchain network.2. It is a replication algorithm to tolerate Byzantine faults.
3. In PoW, each node of the network is required to calculate a hash value of the block header.
4. The PoW procedure is referred to as mining in Bitcoin.
4.
2. It can allow participants to execute certain aspects of transactions automatically.
3. It cannot store information such as domain registration information or membership records.
4. Smart contracts are self-verifying and tamper-resistant.
In Blockchain, which of the following statements about smart contracts are true:
1. A blockchain network uses smart contracts to provide controlled access to the ledger.2. It can allow participants to execute certain aspects of transactions automatically.
3. It cannot store information such as domain registration information or membership records.
4. Smart contracts are self-verifying and tamper-resistant.
5.
2. It is a mechanism used to introduce bitcoins into the system.
3. It is a mechanism that allows blockchain to decentralize security.
4. Blockchain mining can be done with a low-end computer system.
Which of the following statements about blockchain mining are true?
1. It is a process of adding new validated transactions to the blockchain ledger.2. It is a mechanism used to introduce bitcoins into the system.
3. It is a mechanism that allows blockchain to decentralize security.
4. Blockchain mining can be done with a low-end computer system.
6.
In Blockchain, which of the following statements about Byzantine Fault Tolerance is true?
7.
Which of the following is not a characteristic of Proof of Activity consensus mechanism?
8.
In Blockchain, which of the following bitcoin platforms is permissionless?
9.
In Blockchain, which of the following domains stores the data and assets that are not possible or too expensive to store on the main chain?
10.
Which of the following statements about the blockchain testing is not correct?