Select the best statement for determining how consensus is reached.

By every single node in the blockchain network executing the same transaction.

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

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

By every single node in the blockchain network different transactions.

By every single node in the blockchain network executing the same transaction.

Which is the right order for Ethereum Denominations?

Wei, Finney, Szabo, Ether, Tether

What is the nonce-field in a transaction?

Protects against replay attacks

To sum up all ethers sent from that address

Protects against replay attacks

To distribute the workloads in the EVM

Adds a checksum for transactions

In Ethereum how is the block difficulty determined in Ethereum?

The Block Difficulty increases when the time between mined blocks is below 10 seconds, while it decreases when the time is above 20 seconds.

The Block Difficulty is determined by the Ethereum Committee every fortnight to reflect the average amount of transaction and it cannot be influenced by the network itself.

The Block Difficulty increases when the time between mined blocks is below 20 seconds, while it decreases when the tie is above 60 seconds.

In regards to understanding the Ethereum Virtual Machine what statement is true?

The EVM can't access hardware layers or anything outside a blockchain node because it's sandboxed.

The EVM is extremely powerful, non-turing complete and perfect for doing computational intensive thins, because of the direct access to the graphics card.

The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.

While the EVM is Sandboxed, it isn't as powerful as the Bitcoin network, because it's not Turing Complete

The EVM can't access hardware layers or anything outside a blockchain node because it's sandboxed.

Blockchain provenance is defined as _______________?

Recording the history of data, from its inception to various stages of the data lifecycle.

Information sent to the blockchain and written to the blockchain.

Recording the history of data, from its last block to various stages of the data lifecycle

Recording the history of data, from its inception to various stages of the data lifecycle.

Once a transaction has been written and committed to the ledger it cannot be changed.

What is the difference in using Go-Ethereum over Ganache?

Go Ethereum is written in Java whereas Ganache is written in Golang

Can automate builds with Go Ethereum but you can't with Ganache

Go Ethereum is written in Java whereas Ganache is written in Golang

Go Ethereum is real blockchain whereas Ganache is a blockchain simulation

Ganache is a real blockchain whereas Go Ethereum is a blockchain simulation

When specifying blockchain technologies, it is important to understand its benefits and its challenges. What would be two challenges of blockchain technology adoption to an enterprise? (Select two.)

Scalability, transaction speed / cost

What benefit does HPE Cloud Cruiser provide?

Need for proven, production-ready technology

Need a full history of all application data

Need to avoid data duplication or redundancy

The word "Drapp" or "DApp" is most commonly understood to mean what?

Distributed Autonomous Application

Which of these reasons is a good reason to choose a conventional database over blockchain to store application data?

Centralization is to be avoided

Databases should never be used over blockchain

Full history is needed for all data

Which of the following scenarios and databases is least suited to be utilized by a blockchain solution?

Scenario: Law enforcement system; Dataset: Criminal Arrests, Warrants for Arrest, Conviction Date

Scenario: An Email campaign service; Dataset: Recipient Email, From Email; Subject, Body

Scenario: A family filter wifi router; Dataset: Websites Visited, Websites Blocked, Download History

Scenario: Credit score app; Dataset: Credit Score, Hard Inquiries; Collections, Date Removed, Date Added

Blockchain systems can offer what advantage over centralized systems?

Their distributed ledger systems are more secure and immutable

They are much easier to maintain and update

They have significantly higher transaction speeds

Their distributed ledger systems are more secure and immutable

Which of these technical components best represents why cryptocurrency is able to operate successfully?

An immutable digital ledger that is validated and distributed across many peers

Using API calls, cryptocurrency having a direct correlation to USD exchange rates

High performance computing power allows cryptocurrency to be minted just as a central government might do with fiat currency

Blockchain cryptocurrency transactions are always public which generates user trust and adoption

Which of following scenarios and datasets would be best suited to be utilized by a blockchain solution?

Scenario: Online game, Dataset: Unique Items In Game, Battles Won, Quests Completed

Scenario: Mobile app for inspirational quotes; Dataset: First Name, Last Name, Quote of the Day

Scenario: Sales (CRM) website; Dataset: Hot Lead Count, Lead Score, Lead Fullname, Today's Tasks

What does the acronym DAO represent?

Decentralized Autonomous Organization

Distributed Autonomous Operations

Distributed Anonymous Organization

Distributed Anonymous Operations

Decentralized Autonomous Organization

An on-chain Smart Contract might be considered autonomous in nature because:

Once it is deployed, it can never be revoked

It is difficult to alter or update

Once it is deployed, it can never be revoked

Once it is deployed, it is self-managing

Blockchain CBSA Practice Test 4 - Free Online Exam Prep & Questions

Spam

Selling illegal goods, money scams etc.

Hate Speech

Serious attack on a group.

Harassment and bullying

Harassing an individual (including doxing)

Harmful activities

Threatening or glorifying violence or serious harm, including self-harm

Adult content (Consensual)

Nudity/Sexual content

Sexual exploitation and abuse (child safety)

Sexually explicit or suggestive imagery or writing involving minors

Sexual exploitation and abuse (adults and animals)

Sexually explicit or suggestive imagery or writing involving non-consenting adults or non-humans

Plagiarism

Reusing content without attribution (link and blockquotes)

Poorly written

Not in English or has very bad formatting, grammar, and spelling

Inappropriate credential

Author's credential is offensive, spam, or impersonation

Other

Ex. Illegal content, incomplete question...

Blockchain CBSA Practice Test 4

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