Linux Foundation Hyperledger Fabric Certified Practitioner HFCP Exam Questions

Answer : B

In Hyperledger Fabric, the ordering nodes that are actively participating in the consensus mechanism for a given channel are referred to as the 'Consenter set.' These nodes are part of the ordering service and are responsible for creating blocks by ordering transactions and ensuring consistency across the network. The Consenter set receives the transaction logs that need to be replicated across other orderers and peers in the network. This is distinct from the 'Committer set,' which comprises nodes that commit blocks to their ledger, and 'Endorsers,' which are responsible for endorsing transactions by checking them against the chaincode execution policies.

Answer : D

In the context of Hyperledger Fabric's chaincode, the endorsement policy plays a crucial role in defining the organizations that must sign a transaction proposal before it can be considered valid. This policy specifies which members of the network must agree (endorse) a transaction for it to be executed. The policy can require signatures from one or more specific organizations, depending on the chaincode's business logic and the network's governance requirements. This ensures that transactions are agreed upon by the relevant stakeholders, maintaining the integrity and trust within the network.

Answer : B

Hyperledger Fabric allows different versions of the platform to coexist and interoperate on the same network through the use of channel capabilities. Channel capabilities enable organizations running different versions of Fabric binaries to participate on the same channel. These capabilities govern the features that are used by peer nodes and set the minimum version of the Fabric binaries that can be run by peers joined to the channel. This allows for heterogeneous network environments where different nodes might be running different versions of Fabric software .

Answer : C

Intercommunication in Hyperledger Fabric regarding how smart contracts update the World State database is primarily achieved by calling other smart contracts, both within the same channel and across different channels. This process allows smart contracts, also known as chaincode, to interact and transact across the network, updating the World State as necessary based on business logic defined in the contracts. This capability is crucial for complex business processes that span multiple contracts and possibly multiple channels. Unlike setting endorsement policies or configuring peer-to-peer options, calling other smart contracts directly facilitates dynamic and direct interaction between business processes, enhancing the modularity and efficiency of the network. Cross-channel communication must be carefully managed within the permissions and policies defined in the network to maintain security and integrity.

Answer : A

The primary role of orderer nodes in Hyperledger Fabric is to order and package endorsed transactions into blocks. Orderers receive transactions from various peers, ensure that these transactions are in a consistent order, and then package them into blocks that are subsequently appended to the blockchain. This function is crucial for maintaining the consistency and integrity of the ledger across all participating nodes. Orderer nodes do not issue tokens, enforce peer endorsements, or reorder stored blocks for data compression. Instead, their main function is integral to the consensus and ledger maintenance processes within a Hyperledger Fabric network

Answer : B

Theidemixgentool is used to create configuration files for the Identity Mixer based MSP (Membership Service Provider) in Hyperledger Fabric.When configuring membership, theidemixgentool creates three directories:/ca/,/msp/, and/user/1. The/ca/directory contains the issuer secret key, issuer public key, and revocation key, which should only be present for a Certificate Authority (CA). The/msp/directory contains the issuer public key and revocation public key, which are required to set up an MSP that verifies Identity Mixer signatures.The/user/directory specifies a default signer configuration1. Therefore, the correct answer is the user directory, which is created alongside the ca and msp directories by theidemixgentool.

Answer : A

When using LevelDB as the state database in Hyperledger Fabric, there is no specific schema that the data stored in the ledger needs to adhere to. LevelDB is a key-value store, which does not enforce any schema on the data it holds. This flexibility allows applications to define their own formats and structures for the data they store, which can vary from simple strings and numbers to more complex serialized data structures. This schema-less nature of LevelDB enables developers to implement the data handling that best suits their application's needs without the constraints of a predefined database schema.