Blockchain CBDE Exam Questions - Real Practice Questions for Guaranteed Success

Question 1

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

Ato 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.

Bto 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.

Cto 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.

Correct : A

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Ato 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.

Bto 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.

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Question 2

It's easy to write clean-room unit-tests with truffle:

Afor Java, JavaScript, and C++

Bfor JavaScript using Web3.js

Cfor Solidity and JavaScript

Dfor any language, as long as it adheres to the open Testing-Interface from Truffle

Correct : C

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Afor Java, JavaScript, and C++

Bfor JavaScript using Web3.js

Cfor Solidity and JavaScript

Dfor any language, as long as it adheres to the open Testing-Interface from Truffle

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Question 3

With the truffle config file you can manage:

Athe amount of gas your contract deployment and transactions, against your contract, will need. This way you can essentially lower the gas costs over traditional web3.js dApps.

Bdifferent Networks to deploy your contracts to. This way you can easily deploy to a local blockchain, the main-net or the Ropsten/Rinkeby Test-Net with only one parameter.

Cyou can manage your secret API keys to the Ethereum Network. This way you can get access to several different Ethereum nodes at the same time without the need to switch your keyfiles.

Correct : B

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Athe amount of gas your contract deployment and transactions, against your contract, will need. This way you can essentially lower the gas costs over traditional web3.js dApps.

Bdifferent Networks to deploy your contracts to. This way you can easily deploy to a local blockchain, the main-net or the Ropsten/Rinkeby Test-Net with only one parameter.

Cyou can manage your secret API keys to the Ethereum Network. This way you can get access to several different Ethereum nodes at the same time without the need to switch your keyfiles.

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Question 4

Truffle boxes are a great way:

Ato contribute to the box community which is the distributed file system for truffle.

Bto start with a pre-configured environment for most web-development needs.

Cto use tools that makes boxing of Dapps for different platforms very easy.

Correct : B

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Ato contribute to the box community which is the distributed file system for truffle.

Bto start with a pre-configured environment for most web-development needs.

Cto use tools that makes boxing of Dapps for different platforms very easy.

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Question 5

Integrating the community into your testing:

Ais great, because they often find bugs which weren't considered before.

Bis not good, because you might give out secrets.

Correct : A

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Ais great, because they often find bugs which weren't considered before.

Bis not good, because you might give out secrets.

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Master Blockchain CBDE Exam with Reliable Practice Questions

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