CBDE Dumps-BTA Certified Blockchain Developer-Ethereum

Search the latest CBDE dumps by Google? Passcert new released CBDE dumps are helpful for you to pass BTA Certified Blockchain Developer-Ethereum test. As we all know, CBDE exam is a required test for BTA certification, which are designed with the Certification Advisory Board and vetted thoroughly by technology executives, instructors, and developers. With new released CBDE dumps, you can clear the test in the first attempt. 

CBDE Information-BTA Certified Blockchain Developer-Ethereum

The Certified Blockchain Developer-Ethereum (CBDE) exam is an elite way to demonstrate your knowledge and skills in this emerging space. Read the following CBDE exam information, you will have a basic understanding of the test. 

Number of Questions: 70 Questions

Pass Score: 70%

Time Allotted: 90 minutes to complete exam

Exam Cost: $300 USD

Exam Language: English

CBDE Prove You completely Understand How to

Implement web3.js

Write and compile Solidity smart contracts

Create secure smart contracts

Deploy smart contracts both the live and test Ethereum networks

Calculate Ethereum gas costs

Unit test smart contracts

Run an Ethereum node on development machines

Share some CBDE Dumps for Reference

There are 102 questions and answers in CBDE dumps, which can help you test the above skills. Share some CBDE dumps below. 

1.To generate a random number:

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

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

C. it's good to use the RANDAO smart contract.

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

Answer: C

2.When you do external calls to other smart contracts:

A. you should follow the checks-effects-interactions pattern and avoid state changes after the call.

B. you should follow the effects-checks-interactions pattern and avoid state changes before the call.

C. you should follow the checks-effects-interactions pattern, which is only necessary when you do calls to contracts where a direct contract call is not possible.

Answer: A

3.When you are programming a game like poker of battleships where you need to hide opponents values is:

A. with private state variables. This way nobody else other than the smart contract itself can see the information

B. with external contracts holding those values. This way we can make sure that the information flow is following a clear logic and nobody else can access this information.

C. You can't hide anything on the blockchain, because the information is public, just the call is private which means only other smart contracts would be limited in accessing that information.

Answer: C

4.When considering smart contracts and the blockchain it's good:

A. to move all existing logic to the blockchain, so everything runs on the same system. This way it might be more complex, but easier to maintain.

B. to move only those parts to the blockchain that really need the blockchain. This way smart contracts can be easier to read, easier to test and are not so complex.

C. to move those parts to the blockchain that deal with Ether transfers. All other parts can remain in traditional database systems. This way only the value-transfer is on the blockchain.

Answer: B

5.When a smart contract pays out money:

A. it’s good to use a push over a pull method.

B. it’s good to use a push and a pull method to ensure that participants can get their money no matter the contract state. In addition to and pushing it should contain a withdraw method.

C. it's good to use only pull and no push method.

Answer: B