Tag - CBBF exam

How is Blockchain benefiting voting?A . By revealing the identity of each voter and who or what they voted forB . By controlling who gets to voteC . By only allowing a certain number of votes per personD . By allowing voters to trust their vote has been countedView AnswerAnswer:...

Once a record is stored on the Blockchain ____________.A . the record is moved to a secure serverB . the record is stored on a central nodeC . it can be changed by an authorized personD . the record is permanentView AnswerAnswer: D Explanation: Reference can be changed by an...

Blockchain applications can provide____________________.A . the elimination of intermediariesB . building more trust between trusted partiesC . collaboration between trusted partiesD . better cooperation between banksView AnswerAnswer: A

What is Ethereum?A . Another name for BitcoinB . A platform for creating decentralized applicationsC . A currencyD . Another name for BlockchainView AnswerAnswer: B Explanation: Reference: https://blockgeeks.com/guides/ethereum/

An asset is defined as ____________.A . all records on a databaseB . any data on the ledgerC . anything of value requiring accountability of ownershipD . any record on a private networkView AnswerAnswer: C

Which of the following statements sums up the Proof of Work consensus process?A . Miners complete to find a nonce results in a hash that starts with a predetermined number of leading zeros.B . Miners put up a stake. A miner is then selected based on stake value to add...

What does a Merkle tree provide?A . Efficient block lookups and protection against forgeryB . Anonymity and transparencyC . A Turing complete distributed networkD . A way to deploy smart contracts onto the BlockchainE . All of the aboveView AnswerAnswer: A

In a private business Blockchain, transactions are endorsed by______________.A . only relevant business participantsB . only the smart contract developerC . all the nodes on the BlockchainD . all participants with access to the networkView AnswerAnswer: A Explanation: Reference: https://developer.ibm.com/opentech/wp-content/uploads/sites/43/2017/08/Blockchain­Explained-v4.06.AdaptedforBeirutConferenceAug2017-1.pdf (p.10)

One solution to increasing Blockchain Transactions Per Second (TPS) is________.A . adding more network nodesB . off-chain transactionsC . using faster microprocessorsD . fewer regulationsView AnswerAnswer: B

Blockchains work best when they are____________________.A . combined with other technologiesB . used for financial applicationsC . used aloneD . used as an alternative to a databaseView AnswerAnswer: B