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CBDE: BTA Certified Blockchain Developer - Ethereum

Blockchain BTA Certified Blockchain Developer - Ethereum Exam

Name: Blockchain BTA Certified Blockchain Developer - Ethereum Exam
Brand: Pass4Success
SKU: BTA Certified Blockchain Developer - Ethereum
Price: 69.00 USD
Availability: InStock
Rating: 4.7 (165 reviews)

Certification Provider: Blockchain

Exam Name: BTA Certified Blockchain Developer - Ethereum

Duration: 90 Minutes

Number of questions in our database: 102

Exam Version: May. 12, 2024

Exam Official Topics:

Topic 1: Use the essential tooling and systems needed to work with the Ethereum ecosystem/ Understand and work with Ethereum fees
Topic 2: Deploy smart contracts both the live and test Ethereum networks/ Unit test smart contracts
Topic 3: Work within the bounds and limitations of the Ethereum blockchain/ Calculate Ethereum gas costs
Topic 4: Plan and prepare production ready applications for the Ethereum blockchain/ Write and compile Solidity smart contracts
Topic 5: Write, test, and deploy secure Solidity smart contracts/ Run an Ethereum node on development machines Implement web3.js/ Create secure smart contracts

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Free Blockchain BTA Certified Blockchain Developer - Ethereum Exam Actual Questions

The questions for BTA Certified Blockchain Developer - Ethereum were last updated On May. 12, 2024

Question #1

To develop smart contracts:

Ait's good to start with a local in-memory blockchain with unit tests but then deploy to the mainnet as rapidly as possible.

Bit's good to start with a local in-memory blockchain with unit-tests. Then, in the next step, debug and test the smart contract on a test-net like Ropsten or Rinkeby with beta customers to iron out last issues before deploying it to the main-net.

Cit's good to start with a test-net with beta-customers like on the Rinkeby or Ropsten testnet, before testing it locally on an in-memory blockchain simulation such as Ganache. Then deploy it to the main-net.

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Correct Answer: B

Question #2

If you are starting a new ERC20 token:

Ait would be best to start from scratch, just looking at the required interface.

Bit is beneficial to copy and paste the already existing code from the Ethereum wiki and modify this until you like it.

Cbest is to start with an audited implementation, for example from OpenZeppelin, in order to reuse already existing code.

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Correct Answer: C

Question #3

To generate a random number:

Ait's good to use the block timestamp, as this is always different.

Bit's good to use the block hash as this is clearly always very different.

Cit's good to use the RANDAO smart contract.

Dit's not possible to have a random number in a deterministic environment such as the Ethereum blockchain.

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Correct Answer: C

Question #4

If you are starting a new ERC20 token:

Ait would be best to start from scratch, just looking at the required interface.

Bit is beneficial to copy and paste the already existing code from the Ethereum wiki and modify this until you like it.

Cbest is to start with an audited implementation, for example from OpenZeppelin, in order to reuse already existing code.

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Correct Answer: C

Question #5

Truffle has an integrated in-memory blockchain which makes unit-testing very easy:

ATrue, but it's still good to use Ganache, or even a real private network for testing.

BFalse, it's necessary to use Ganache or even a real private network for testing.

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Correct Answer: A

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