CBSA exam

The gas price is a value set by the creator of the blockchain transaction? (Select best answer.)A . FALSEB . Its NegotiableC . TRUEView AnswerAnswer: C Explanation: The gas price is a value set by the creator of the transaction, who has to pay gas_price * gas up front from...

When considering tokens on the Ethereum Blockchain what is the main difference between ERC20 and ERC721 tokens?A . No difference on Ethereum all tokens are fungibleB . ERC20 is not fungible while ERC721 tokens are fungibleC . ERC721 is not fungible while ERC20 tokens are fungibleD . No difference on...

How does a client app communicate with Hyperledger fabric chaincode (Smart Contracts)?A . The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transactionB . The app uses Hyperledger Composer to communicate with CouchDB which in turn...

In the Bitcoin blockchain the "block creation time" is set to 10 minutes and this can never change.A . FALSEB . TRUEView AnswerAnswer: B Explanation: Remember, that the block creation time is set to 10 minutes and this can never change. So after a fixed time of approximately 2 weeks...

Which of the following is true concerning Hyperledger Composer?A . It’s a competing blockchain to Hyperledger Fabric in the Hyperledger suite of toolsB . It’s an API layer that sits above Hyperledger Fabric and is required to interact with the Fabric blockchainC . It’s a toolset and framework for easily...

You currently on a conference call with an executive from a too big to fail bank. They are validating that they want to use Quorum or another enterprise blockchain. They specifically want to know what type of consensus algo it uses and what industry for the Quorum blockchain targets.A ....

In Ethereum the difficulty adjustment algorithm is coded in the ___________ file.A . calcDifficultyFrontierB . block_validator.goC . calcDifficultyHomesteadD . calcDifficultyvalidator.goView AnswerAnswer: B

Miner takes each accepted transaction and writes it to the current block C. Both of these ordering sequences can occur D. None of the aboveView AnswerAnswer: A

By default, who can see transaction details on a public/open blockchain?A . The initiatorB . EveryoneC . The recipient of a transactionD . The network owner / administratorView AnswerAnswer: B

To interact with a deployed Ethereum Smart Contract, a user or app must:A . Have a reference to the public address of the deployed Smart ContractB . Have the appropriate permissions needed to invoke the functions of the Smart ContractC . Have sufficient gas to perform read and write operations...