CBDE 試験問題を無料オンラインアクセス

Hashing Mining uses:

• A.the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces different hashes.
• B.the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256.
• C.Keccack256 while internally to hash values it's easy to use the Dagger-Hashimoto to create a meaningful hash.

The nonce-field in a transaction is used:

• A.to have an additional checksum for transactions.
• B.to sum up all ethers sent from that address.
• C.to protect against replay attacks.

What's the difference between Ethereum Request for Comments (ERC) and Ethereum Improvement Proposals (EIP)?

• A.ERC are here to propose new distributed applications on top of the Ethereum layer, while EIP are here to improve existing mining software.
• B.ERC are an open platform to discuss continuous forking of the Ethereum platform. Successful forks are then incorporated in the EIP for further voting by the Ethereum Consortium.
• C.ERC are here to define standards for the usage of Ethereum. EIP are here to improve the Ethereum Protocol itself.

If you need more fine-grained functionality than solidity offers out of the box:

• A.you have to import pre-compiled assembly files which are then hard-copied into the bytecode of the compiled solidity file.
• B.you can use Viper, the experimental assembly like language specifically to offer more flexibility.
• C.you can incorporate inline-assembly to get better controls.

Go-Ethereum vs. Ganache:

• A.both are the same, just implemented in a different language.
• B.with Ganache you get a real blockchain node where you can connect to the Test-Networks Rinkeby and Ropsten.
• C.with Go-Ethereum you get a real blockchain node where you can create your own local private network, connect to Test-Networks or the Main-Net, while with Ganache you get an in-memory blockchain simulation.