Linux Foundation Hyperledger Fabric Certified Practitioner (HFCP) Exam HFCP Exam Dumps: Updated Questions & Answers (October 2025)

In Hyperledger Fabric, certificates primarily provide identity for various actors within the network, such as peers, orderers, and clients. These certificates facilitate not just node-to-node communication and data integrity but also contribute significantly to the security measures of the network, such as authentication and authorization processes. Importantly, these certificates are utilized in TLS (Transport Layer Security) protocols to secure communications between nodeson the network. Fabric utilizes X.509 certificates for these purposes, which are issued by a Certificate Authority (CA) within the network .

In Hyperledger Fabric, block events are provided by peers. Whenever a block is committed to a peer's ledger, that peer generates a corresponding event. These events can include the full block content or a summary of the transactions within the block, allowing applications to register and receive notifications about these events. This setup is crucial for applications that need to respond to changes recorded on the blockchain in real-time .

In Hyperledger Fabric, private data collections are configured using a separate JSON file that describes the details of the collection, such as the name, policy, and member organizations that have access to it. This configuration file is included during the chaincode deployment process. The collections configuration file defines how private data is managed, including its lifecycle,storage, and dissemination between authorized peers. By configuring private data collections in this manner, organizations ensure that sensitive information is only accessible to specific participants in the network, thus maintaining confidentiality and compliance with data governance standards​​.

The Fabric Gateway client APIs in Hyperledger Fabric streamline the transaction submission process by combining endorsement, submission, and commitment into a single function. This allows client applications to efficiently manage transaction submissions with a single line of code, specifically through theSubmitTransaction()function. This consolidation simplifies the interaction model for applications, enabling a focus on business logic rather than the underlying blockchain infrastructure details .

In Hyperledger Fabric, to enable CouchDB as the state database, thestateDatabaseconfiguration option in thecore.yamlfile must be changed fromgoleveldbtoCouchDB. This change directs the peer to use CouchDB instead of the default LevelDB for storing the world state, which can then be queried using rich queries and provides additional features like indexing​​.

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​​.

In Hyperledger Fabric's modular architecture, the Membership Service Provider (MSP) is the pluggable component responsible for handling identities. The MSP abstracts the identity validation and authentication processes, allowing organizations to implement their preferred identity services while maintaining interoperability within the network. It defines the rules by which identities are validated, issued, and revoked. This component is essential for the permissioned nature of Hyperledger Fabric, ensuring that only authorized participants can execute specific actions on the network​​.

In Hyperledger Fabric, chaincode events, transaction events, and block events serve different purposes and are emitted differently. Chaincode events must be explicitly programmed into the smart contract. Developers need to use thesetEventmethod within the chaincode to emit custom events that applications can listen to. On the other hand, transaction and block events are generated by the system automatically. These events notify listening applications of new blocks added to the chain or transactions included in blocks, without requiring any additional programming effort within the smart contracts​​.

In Hyperledger Fabric, a unique ID to represent an asset on the ledger is typically generated in the client application before the transaction is submitted to the blockchain. This approach ensures that each asset has a unique identifier, which is crucial for tracking and managing assets throughout their lifecycle on the ledger​​.

In Hyperledger Fabric, to send information that should be stored only in a private data collection during a transaction submission, the information must be included as transient data. Transient data is sent along with the transaction proposal but is not recorded on the ledger; instead, it is used within the chaincode for processing and can then be stored in private collections as needed. This method ensures that sensitive information is kept out of the public ledger and is only available to authorized parties as defined in the private data collection configuration. Transient data provides a secure way to handle sensitive or confidential information within the network without exposing it on the shared ledger​​.