最新的Blockchain BTA Certified Blockchain Developer - Ethereum - CBDE免費考試真題

A. a list of transactions is incorporated in that block. Gas used during the execution is attached to the executing contracts while the block reward is automatically spread across the mining pool to ensure a fair spread. Consensus is reached by a special form of hash code.

B. a list of transactions as well as uncles is incorporated in the block. All gas that is used during those transactions is added to the miners' balance. Also, the block reward is added to the miner. Then the same transactions are run again by every participating node in the network to achieve consensus.

A. working with /* comment */ or /** @.. natspec style */

B. working with either // or ///

C. not possible, all comments must be multi-line.

A. must Implement the Ethereum Protocol to connect to other Ethereum Nodes.

B. must use Web3.js, which is closed source to communicate to other Ethereum Nodes.

C. the library you use must make use of the JSON-RPC Interface of an Ethereum Node.

A. 1 Ether = 10^18 wei, 10^6 Gwei, 10^6 Finney

B. 1 Ether = 10^18 wei, 10^9 Gwei, 10^3 Finney

C. 1 Ether = 10^16 wei, 10^13 Gwei, 10^3 Finney

D. 1 Ether = 10^19 wei, 10^13 Gwei, 10^3 Finney

A. a Network running only in a private area, where people cannot join freely and openly.

B. a side Channel to the Ethereum Main Net which costs less gas to run smart contracts.

C. an exact clone of the Rinkeby Test-Network which can be started as virtual machine in the Azure Cloud.

A. all remaining gas is returned.

B. all gas is consumed.

A. contract MyContractB derives MyContractA {...}

B. contract MyContractA extends MyContractB {...}

C. contract MyContractA inherit (MyContractB) {...}

D. contract MyContractA is MyContractB { ... }