Hyperledger Fabric Certified Practitioner Exam Questions PDF download

QUESTION: 6

When deploying an Orderer environment, variables must be customized or overridden in which artifact?

crypto-config.yaml
docker-compose.yaml
configtx.yaml
orderer.yaml

Answer(s): D

Explanation:

When deploying an Orderer environment in Hyperledger Fabric, the primary configuration file that must be customized or overridden is orderer.yaml. This file contains the configuration settings specifically for the orderer node, including general ledger type, consensus type, and various operational settings like batching, timeouts, and MSP configurations. Other files like crypto-

config.yaml, docker-compose.yaml, and configtx.yaml serve different roles. crypto-config.yaml is used for generating cryptographic material, docker-compose.yaml for defining services, networks, and volumes for containers, and configtx.yaml for channel configuration and consortium definitions. Therefore, orderer.yaml is critical for setting up the orderer's behavior and parameters in the network environment.

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QUESTION: 7

Which subcommand adds a peer to a channel in Hyperledger Fabric?

peer channel fetch
peer channel creace
peer channel updace
peer channel join

Answer(s): D

Explanation:

In Hyperledger Fabric, the correct subcommand to add a peer to a channel is peer channel join. This command is used by a peer node to join an existing channel. The command requires a block to be specified which typically is the genesis block of the channel, allowing the peer to synchronize with the channel's ledger from the beginning. Other commands like peer channel fetch, peer channel create, and peer channel update serve different purposes. peer channel fetch retrieves blocks from a channel, peer channel create is used to set up a new channel, and peer channel update modifies channel settings. Thus, peer channel join is the specific command used to connect a peer to a channel.

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QUESTION: 8

After the transaction that contains the delState("A") function is committed, what happens to the ledger and state database?

getstate("A") function returns the current state of the key "A".
The deleting transaction sets an empty value to the key "A" in the write set.
The state of the key "A" is removed from the state database, but its history remains in the ledger.
All transaction histories which updated the state "A" are deleted from the ledger.

Answer(s): C

Explanation:

In Hyperledger Fabric, when a transaction that includes the delState("A") function is committed, it results in the removal of the state of the key "A" from the current state database. However, the history of all transactions that have affected the key "A" remains intact in the ledger. This operation ensures that while the current state reflects the deletion, the immutability and traceability of the ledger are preserved, allowing for auditability and verification of past states. Options such as setting an empty value to the key or altering the transaction history are not supported, as they would violate the principles of immutability and transparency central to blockchain technology. Therefore, the correct outcome of a delState("A") operation is that the current state of "A" is deleted, but its transaction history remains accessible in the ledger.

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QUESTION: 9

How would a developer iteratively test and develop a smart contract without the overhead of the smart contract lifecycle process for every update?

Running chaincode for Smart Contracts in development mode.
Manually update the Smart Contract code on the network.
Deploy the Smart Contract on the network for every update.
Use a Production Network to test and develop Smart Contracts.

Answer(s): A

Explanation:

For developers looking to iteratively test and develop smart contracts in Hyperledger Fabric without the overhead of the full lifecycle process for each update, the recommended approach is to run the chaincode in development mode. This mode allows developers to test and debug chaincode directly on their machines without having to package, install, approve, and commit changes on the network each time. Development mode simplifies the iterative development process by allowing direct interaction with the chaincode during its development, making it easier to make and test changes quickly and efficiently. This contrasts with other methods that involve manual updates, redeployments, or using a production network, all of which are more time-consuming and complex.

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QUESTION: 10

Which of the following information do signature policies provide when creating a network in Hyperledger Fabric?

Identity specific users who must sign in order to satisfy a policy.
B Number of nodes in the network
Private keys of all network participants.
Type of consensus algorithm used

Answer(s): A

Explanation:

In Hyperledger Fabric, signature policies specify the identities of specific users who must sign a transaction for it to be considered valid. These policies define the endorsement rules associated with a chaincode and are a critical component of the transaction flow. They ensure that transactions are endorsed by the correct entities as stipulated by the governance of the network. Signature policies are not related to the number of nodes, private keys of participants, or the type of consensus algorithm used but are strictly about defining which users or member organizations' signatures are required to fulfill transaction criteria.

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Linux Foundation Hyperledger Fabric Certified Practitioner HFCP Dumps in PDF

Free Linux Foundation HFCP Real Questions (page: 12)

QUESTION: 6

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QUESTION: 7

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QUESTION: 8

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QUESTION: 9

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QUESTION: 10

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