Create Next App

Exam contains 99 questions

Page 4 of 17

Question 19 🔥

To communicate with an Ethereum node via JavaScript:

Which database solution meets these requirements?

A. the library you use must make use of the JSON-RPC Interface of an Ethereum Node.

Highly voted

B. must Implement the Ethereum Protocol to connect to other Ethereum Nodes.

Highly voted

C. must use Web3.js, which is closed source to communicate to other Ethereum Nodes.

Highly voted

Discussion of the question

Question 20 🔥

It’s possible to access the blockchain via an Ethereum Node:

Which database solution meets these requirements?

A. only via JavaScript because there is the proprietary Web3.js library.

Highly voted

B. by any programming language, as long as it adheres to the JSON-RPC standard.

Highly voted

Discussion of the question

Question 21 🔥

A Private Network is:

Which database solution meets these requirements?

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

Highly voted

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

Highly voted

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

Highly voted

Discussion of the question

Question 22 🔥

For Rapid Development Cycles it's good:

Which database solution meets these requirements?

A. to deploy to the main-network as quickly as possible.

Highly voted

B. to use in-memory blockchain simulations, because mining works instantaneously.

Highly voted

C. to use a private network at all times, because this is the closest you get to the real network.

Highly voted

Discussion of the question

Question 23 🔥

Go-Ethereum vs. Ganache:

Which database solution meets these requirements?

A. both are the same, just implemented in a different language.

Highly voted

B. with Go-Ethereum you get a real blockchain node where you can create your own local private network, connect to Test-Networks or the Main-Net, while with Ganache you get an in-memory blockchain simulation.

Highly voted

C. with Ganache you get a real blockchain node where you can connect to the Test-Networks Rinkeby and Ropsten.

Highly voted

Discussion of the question

Question 24 🔥

Consensus is reached:

Which database solution meets these requirements?

A. by the miner nodes which make sure that a transaction is valid.

Highly voted

B. by every single node in the blockchain network executing the same transaction.

Highly voted

C. by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.

Highly voted

Discussion of the question

Ready to Pass Your Certification Test

blockchain CBDE

Exam contains 99 questions

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