CBDE 무료 덤프문제 온라인 액세스

Truffle:

• A.is a library that helps developers to connect to Ethereum nodes, because it abstracts the JSONRPC interface.
• B.is a framework that helps developers with Testing, Deployment and Management of Smart Contracts and Distributed Applications.
• C.is a framework for Java, similar to Web3.js for JavaScript. It's a great way to develop distributed Java enterprise applications.

DApps are:

• A.a new way of applying logical operations for banks and big financial institutions. This way they can reduce the staff while operating at increased security.
• B.great, because they cut the middle man, run on a trusted platform, apply logic to the blockchain where already economic assets are running and thus allow peer to peer trade.
• C.an amazing way to create new applications. Those applications run entirely separated from other applications on the platform and allow for logical interactions. They can't access any funds to add an additional layer of trust.

Address.Call vs. Address.Delegatecall:

• A.Address.call() is used for calling other contracts using the scope of the called contract in terms of storage variables. Address.delegatecall() is used for libraries, which uses the storage variables of the contract who called. Libraries are a great way to re-use already existing code and delegatecall can make sure that no storage is used from the library, instead it looks like the code is directly copied into the calling contract.
• B.Address.delegatecall() is used for calling other contracts using the scope of the called contract in terms of storage variables. Address.call() is used for libraries, which uses the storage variables of the contract who called. Libraries are a great way to re-use already existing code and call() can make sure that no storage is used from the library, instead it looks like the code is directly copied into the calling contract.

GETH:

• A.is one of the many blockchain nodes that implement the Ethereum Protocol. It's open source and everyone can contribute.
• B.is the library that is used for the blockchain node Go-Ethereum. It is also used by Parity is parts, because it's closed source.
• C.is the reference implementation of the Ethereum protocol and every other node implementation internally uses the closed-source from Geth.

EVM assembly:

• A.is another language similar to LLL, more secure than Solidity.
• B.can be split across multiple files, but every contract must be in a file with the same name as the contract itself.
• C.is much better than Solidity and a viable alternative.