CBSA 試験問題を無料オンラインアクセス

Consider the following scenario: A solo app developer wants to create their own cryptocurrency and build a blockchain based that allows users to buy and sell second-hand items with that cryptocurrency from each other. Before the transaction is considered complete, the purchaser must put the funds in an escrow service and the sender must enter the courier tracking number into that same escrow. Time is of the essence and this developer doesn't want to worry about networking of infrastructure. This app must be fully autonomous or
"decentralized".
Which architecture would best solve the product need?

• A.Hyperledger Fabric for the escrow service and token creation using chaincode; User-facing features built with Hyperledger Composer
• B.Ethereum for token creation and escrow service; User-facing features built with web technologies and deployed through IPFS
• C.The product cannot be built. Fully decentralized apps are not yet possible for user interface
• D.Ethereum for token creation; Traditional multitier API and database for escrow service; User-facing features built in web technologies then minified unto a String and deployed to an Ethereum Smart Contract

When you are developing with Fabric Composer which of the following is true?

• A.Simplifies the development of applications
• B.Decreases the time of development
• C.Increases the time of development
• D.Simplifies the integration of client applications

Which of the following is true concerning Hyperledger Composer?

• A.It's an API layer that sits above Hyperledger Fabric and is required to interact with the Fabric blockchain
• B.It's a toolset and framework for easily developing business networks
• C.It's a competing blockchain to Hyperledger Fabric in the Hyperledger suite of tools
• D.It's a consensus-focused replicable state machine framework for blockchain development

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 Contract
• B.All of the above
• C.Have the appropriate permissions needed to invoke the functions of the Smart Contract
• D.Have sufficient gas to perform read and write operations against the Smart Contract

The block creation time is set to how many minutes in Bitcoin?

• A.10
• B.100
• C.15
• D.120
• E.150
• F.1