Online Access Free CBDE Exam Questions

To communicate with an Ethereum node via JavaScript:

• A.must use Web3.js, which is closed source to communicate to other Ethereum Nodes.
• B.must Implement the Ethereum Protocol to connect to other Ethereum Nodes.
• C.the library you use must make use of the JSON-RPC Interface of an Ethereum Node.

If we divide two integers: 5/2, the result is:

• A.2.5, because it's automatically converted into a float.
• B.2, because the decimal is truncated.
• C.3, because it's always rounded.

You need to use ____________ to get the address that initiated the transaction.

• A.Tx.origin
• B.Msg.sender

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.

What is the difference between ERC20 and ERC721 Tokens in simple terms?

• A.The tokens of a certain ERC20 symbol are all the same, the tokens of an ERC721 symbol are all different. So, ERC20 tokens are fungible, while ERC721 tokens are non-fungible.
• B.The tokens of a certain ERC20 symbol are all different, the tokens of an ERC721 symbol are all the same. So, ERC20 tokens are non-fungible while ERC721 tokens are fungible.