Download Blockchain.CBDE.VCEplus.2019-10-30.102q.tqb

Vendor: Blockchain
Exam Code: CBDE
Exam Name: BTA Certified Blockchain Developer - Ethereum
Date: Oct 30, 2019
File Size: 260 KB

Demo Questions

Question 1
Consensus is reached:
  1. by the miner nodes which make sure that a transaction is valid.
  2. by every single node in the blockchain network executing the same transaction.
  3. by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.
Correct answer: B
Question 2
Smart Contracts can be written in:
  1. Java, C++, Solidity and JavaScript, because the Ethereum Blockchain is completely language agnostic and cross compilers exist for every major language.
  2. Solidity, Viper, LLL and Serpent, because those are high level languages that are compiled down to bytecode.
  3. Solidity and JavaScript, because those are the official first implementations for Distributed applications and the Blockchain supports those languages fully.
Correct answer: B
Question 3
Solidity gets compiled:
  1. to bytecode that can't be understood by humans.
  2. to bytecodes which are essentially opcodes running instruction by instruction.
Correct answer: B

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