Which of the following statement is false? Multiple Choice A distributed ledger contains many copies of the same ledger. A distributed ledger stores the same set of transaction records. 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. A transaction record cannot be added to the blockchain unless there is network consensus. 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: Multiple Choice public blockchain. permissionless blockchain. private blockchain. consortium blockchain. In the Ethereum network: Multiple Choice because a smart contract describes business rules and is also flexible for different industries, it can be modified to fit the business after a block is inserted to the Ethereum network. transaction fees are higher than Bitcoin. mining of Ether occurs at a constant rate. miner uses SHA256 to determine if a block is a valid block. Which feature cannot be found in bitcoin? Multiple Choice Double spend Anyone can join and leave the bitcoin network at any time Immutable history of transactions A new block is added every 10 minutes Which of the following statements is true? Multiple Choice Because blockchain transactions are stored in chronological order, you may trace a block from an earlier transaction block to the most recent block in the blockchain. Both permissioned and public blockchains need miners to determine which transaction block should be added next. Ethereum is a private blockchain. Smart contract was introduced in Ethereum. 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: Multiple Choice miner. blockchain. middleman. consensus