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 CBDE Dumps with Practice Exam Questions Answers

Questions: 102 questions

Last Update: Jan 31, 2023

Blockchain Certification Exam CBDE has been designed to measure your skills in handling the technical tasks mentioned in the certification syllabus

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CBDE Questions and Answers

Question # 1

A Private Network is:


a side Channel to the Ethereum Main Net which costs less gas to run smart contracts.


an exact clone of the Rinkeby Test-Network which can be started as virtual machine in the Azure Cloud.


a Network running only in a private area, where people cannot join freely and openly.

Question # 2

Unit-Testing on a local chain is important, because it helps you:


to run tests quickly and especially for free, compared to continuous deployment on the MainNetwork. This way you save a lot of fees, time and costs.


to run tests in an environment where logging is activated. On the Main-Net you have no access to transaction logs and this is ultimately the information you need to debug your contracts.


to avoid regression bugs with contracts that are updated constantly on the main-net. Once you update a contract on the main-net, the address stays the same, but the code changes and this can have disastrous side-effects.

Question # 3


sends the gas stipend of 2300 gas and returns a false on error.


sends all the gas along and cascades exceptions.


sends all the gas along and returns a false on error.


sends the gas stipend of 2300 gas and cascades exceptions.

Question # 4

EVM assembly:


is much better than Solidity and a viable alternative.


can be split across multiple files, but every contract must be in a file with the same name as the contract itself.


is another language similar to LLL, more secure than Solidity.

Question # 5

Assert is used:


to check internal states that should never happen.


to check input arguments from users.