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Free CBSA Exam Braindumps (page: 31)

Page 31 of 58
PDF with 229 Questions

Select the best statement for determining how consensus is reached.

  1. By the miner nodes which make sure that a transaction is valid.
  2. By a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.
  3. By every single node in the blockchain network different transactions.
  4. By every single node in the blockchain network executing the same transaction.

Answer(s): D

Explanation:

If you send a transaction to the network, then one miner-node will at some point pick it up. The Miner will run the transaction and add the result to the next block. Now, this doesn’t imply consensus yet. By design all nodes don’t trust each other. Each node must verify that the transaction the miner added to the block is really valid.

This means, consensus is reached by having every node running the same transactions again and verifying that the result is correct. Plus, the results are verified in a cryptographic manner.



When developing in Ethereum which is considered to be an In-Memory Blockchain simulations for rapid development?

  1. Cpp-ethereum
  2. Geth
  3. TestRPC
  4. Parity

Answer(s): C

Explanation:

There are several redundant implementations of the Ethereum protocol to ensure the correctness of the implementation. Additionally, not all blockchain nodes operate the same way. Some are purely for developing and hold a blockchain in-memory and just simulate the mining. Real Blockchain Nodes: 1. Cpp-ethereum 2. Go-Etheruem (GETH) 3. Parity In-Memory Blockchain simulations for rapid development: 1. TestRPC 2.
Ganache 3. Truffle Developer Console Clients to access the blockchain in a convenient way: 1. MetaMask browser Plugin through Infura 2. Status.IM Android/iOS app through Infura 3. MIST DApp Browser with integrated GETH



Ethereum smart contracts can be written in what programming languages? Select all that apply.

  1. Serpant
  2. Cobol
  3. LLL
  4. LLC
  5. Vyper
  6. Node.js
  7. IOS
  8. Mutan
  9. Solidity

Answer(s): A,C,H,I

Explanation:

Ethereum Smart Contracts run on compiled bytecode, which means that there can be several high-level languages which code can be written in. In particular, Ethereum has a number of languages available: 1. Solidity – the most popular language now (2018). 2. Vyper – A Language by Vitalik Buterin with an emphasis on security 3. LLL – “Low Level Lisp-like Language” 4. Mutan – Golang-like, deprecated in 2015 5. Serpent, Python-like, but seems to be no longer maintained 6. Bamboo



Which is the right order for Ethereum Denominations?

  1. Finney, Szabo, Mether, Wei
  2. Gwei, Szabo, Finney, Ether
  3. Finney, Szabo, Mether, Gwei
  4. Wei, Finney, Szabo, Ether, Tether

Answer(s): B

Explanation:

Most widely used are Wei, Gwei, Finney and Ether. With the tool https://etherconverter.online/ you can easily convert different units.



Page 31 of 58



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Ardi commented on November 14, 2024
its a great platform to upskilling your knowledge about blockchain
Anonymous
upvote