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Free CBDE Exam Braindumps (page: 7)

Page 6 of 26
PDF with 102 Questions

Externally Owned Accounts (EoA):

  1. are changing their address every time a Transaction is sent because of the nonce.
  2. are keeping their address, but on the blockchain a nonce is increased every time they send a transaction to avoid replay attacks.

Answer(s): A



What are Ethereum Nodes?

  1. Programs implementing the Ethereum Protocol to talk to each other and JSON-RPC interfaces to talk to the outside world.
  2. A Java-Script library to compile and run Solidity Code.
  3. A Framework for deploying and running smart contract in a decentralized way.

Answer(s): A



To communicate with an Ethereum node via JavaScript:

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

Answer(s): A



It’s possible to access the blockchain via an Ethereum Node:

  1. only via JavaScript because there is the proprietary Web3.js library.
  2. by any programming language, as long as it adheres to the JSON-RPC standard.

Answer(s): B






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