Hyperledger Fabric essentially implements a private validator network protocol.Which of the following statements are true?

All the entities in a network must register with membership services to obtain an identity with access and transaction authority in the network.

None of the entities in a network must register with membership services to obtain with access and transaction authority on the network.

Selected entities in a network must register with membership services to obtain an identity with access and transaction authority on the network.

All the entities in a network must register with membership services to obtain an identity with access and transaction authority in the network.

Selected entities in a network must register with Reputation Manager to obtain an identity with access and transaction authority on the network.

Which of the following provides Immutability?

Network configuration cannot be changed

Assurance that a transaction cannot be altered

Network configuration cannot be changed

Guarantee that participants will never put bad information on the Blockchain

What means "Forking" the Hyperledger Fabric Github repository? (Select two.)

Fork will fork the entire repository including all the branches.

Creating a copy of this repository under your GitHub account.

Fork will fork the entire repository including all the branches.

Forking is not allowed in Github.

Moving this repository to your GitHub account and removing contents from previous repository.

Fork will fork the specific repository without all the branches.

Creating a copy of this repository under your GitHub account.

When deploying a database option there are some important things to consider from a deployment perspective. CouchDB and LevelDB can be deployed with Fabric.Which of the following is a true statement in regards to ledger deployment?

A CouchDB database is closely co-located with a network node and runs in a separate operating system process

A LevelDB database is closely co-located with a network node and runs in a separate operating system process

A CouchDB database is closely co-located with a network node and it is embedded within the same operating system processD. A LevelDB database is closely co-located with a network node and it is embedded within the same operating system process

Hyperledger can best be described as which of the following?

An effort to advance cross-industry blockchain technologies

A Newer Version of Proof of Stake

An IBM owned solution that is a single blockchain

A newer version of Proof of Work

An effort to advance cross-industry blockchain technologies

What is the best description of how Kafka is utilized for consensus approach in Hyperledger Fabric?

Permissioned voting based Leader does ordering. Only in-sync replicas can be voted as leader.

Kafka does not support crash tolerance but it does not offer protection against rogue nodes in the network.

Provides Byzantine fault tolerance. Finality happens in a matter of seconds. Scale to petabytes of data, distributed across many clusters.

Provides Byzantine fault tolerance. Finality happens in a matter of seconds.

Permissioned voting based Leader does ordering. Only in-sync replicas can be voted as leader.

Voting-based algorithms are advantageous in that they provide a benefit but a tradeoff. (Select two.)

Trade off between scalability and performance.

Trade off between scalability and security.

Better security due to node control.

Trade off between scalability and performance.

Hyperledger Fabric is a blockchain implementation that is designed for deploying a modular and extensible architecture.Which of the following is NOT true about the architecture of Hyperledger?

It has a native cryptocurrency token

It has a rich API development capacity

Hyperledger Fabric Ledger has two parts.What are they?

State Data and Transaction Logs

Stateful Data and Membership Logs

Ordering service nodes also provide the following services EXCEPT?

Checks the Certificate details and others to validate the transaction.

Maintenance of a system chain that defines ordering service configurations, root certs and MSP IDs for authenticated organizations and a grouping of profiles containing the various consortia within the network.

Checks the Certificate details and others to validate the transaction.

Filtering and validation for configuration transactions that reconfigure or create a channel.

Hyperledger fabric business network is divided into which of the following categories?

Blockchain, Chaincode and Membership

Blockchain, Registration, Identity

Blockchain, Chaincode and Membership

Hyperledger Explorer is what type of web application? (Select two.)

A Nodejs based web app which runs on Node/Express

Uses MySQL as the backend database

A Nodejs based web app which runs on Node/Express

A JS based web app which runs on Node/ExpressJS

Uses PostGres SQL as the backend database

Uses MySQL as the backend database

When reviewing chaincode you see a function called "ChaincodeStubInterface" in the program.What does this function do?

It is used to access the ledger and modify the ledger.

It is used to access the ledger.

It is used to access the chaincode interface.

It is used to access the ledger and modify the ledger.

It is used to stop the chaincode interface.

There are two popular approaches to defining assets in most blockchain solutions. (Select two.)

Stateless UTXO model, where account balances are encoded into past transaction records.

Account model, where account balances are kept in state storage space on the ledger.

Stateless UTXO model, where account balances are encoded into past transaction records.

Account model, where account balances are kept in state storage space in memory registers.

Stateful UTXO model, where account balances are encoded into past transaction records.

Account model, where account balances are kept in stateless storage space on the ledger.

Stateless UTXO model, where account balances are encoded into current transaction records.

Account model, where account balances are kept in state storage space on the ledger.

The use of cryptographic hashing with blockchain provides for which of the following?

Ensuring data blocks are immutable

Providing for flexibility in security design

Providing for ease of analytical insight

Ensuring data blocks are mutable

Ensuring data blocks are immutable

What function in chaincode will be used to store a state on the blockchain ledger?

ChaincodeStubInterface.PutState

ChaincodeStubInterface.getFunctionAndParameters

ChaincodelLedgerInterface.PlaceState

ChaincodeStubInterface.PlaceState

ChaincodeStubInterface.PutState

ChaincodeLedgerInterfaceStoreState

There are generally two ways to develop business contracts in Hyperledger. (Select two.)

Code individual contracts into standalone instances of chaincode.

Use chaincode to create decentralized applications that manage the life cycle of one or multiple types of business contracts, and let end users instantiate instances of contracts within these applications.

Code individual contracts into standalone instances of chaincode.

Use chaincode to create decentralized applications that manage the life cycle of one or multiple types of business contracts, and let end users instantiate instances of contracts within these applications.

Code multiple contracts into distributed instances of chaincode.

Code individual contracts into distributed instances of chaincode.

Use chaincode to create centralized applications that manage the life cycle of one or multiple types of business contracts, and let end users instantiate instances of contacts within these applications.

Blockchain CBDH Practice Test 2 - 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...

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