BLOCKCHAIN - Certified Blockchain Business Foundations Set 1

A private Blockchain does not use proof of work consensus ✘ A private Blockchain is more efficient and has faster transaction times ✘ A private Blockchain is not distributed ✘ A private Blockchain often requires the identity of users to be known ✔ D

1 ✘ B

Voting ✘ A video sharing website ✘ Medical records ✘ Identity management ✔ All of the above ✔ E

The hash of the Merkle root and the header of the previous block ✘ The hash of every transaction in a specific block and the next block ✘ The time stamp of the block and the genesis block hash ✘ The hash of the previous block ✔ D

By revealing the identity of each voter and who or what they voted for ✘ By controlling who gets to vote ✘ By only allowing a certain number of votes per person ✘ By allowing voters to trust their vote has been counted ✔ D

Miners complete to find a nonce results in a hash that starts with a predetermined number of leading zeros. ✘ Miners put up a stake. A miner is then selected based on stake value to add a new block to the chain. If a miner adds an invalid block to the chain, that minerloses their stake. ✘ All nodes agree on the data of the transaction. ✘ Miners send assets to an inactive address. This process selects the next owner of a block. ✔ C

Windows compatible ✘ energy efficient ✘ Linux compatible ✘ turing-complete ✔ D

Hyperledger Corda Bitcoin Ethereum All of the above A,C,D

the elimination of intermediaries ✘ building more trust between trusted parties ✘ collaboration between trusted parties ✘ better cooperation between banks ✔ A

Security through distribution ✘ Anonymity through cryptography ✘ Fault Tolerance through distribution ✘ Immutability through hashing ✔ B