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Linux Foundation HFCP Exam Questions
- Topic 1: Fundamentals of Blockchain: It includes sub-topics of Distributed Ledgers, Smart Contracts, and Consensus. The topic also covers Consensus and Business Benefits as well.
- Topic 2: Hyperledger Fabric Networks: The topic covers Network Structure, Transaction Flow, Ordering Service, Peers and World State Storage. Moreover, questions about Network Creation, Membership Service Providers, Maintenance and Operation, and Channel-related Operations also appear. Lastly, the topic delves into Design and Deployment of Production Networks.
- Topic 3: Smart Contracts: It focuses on Design and Implementation, Chaincode Lifecycle, Reading and Modifying the Ledger State, Executing Queries on the Ledger, Private Data and Private Data Collections, and State-based Endorsement Policies.
- Topic 4: Client Applications: This topic discusses Gateway Model, Offline Signing, Peer Gateway Service, and Smart Contract Invocation. It also covers the sub-topic of Chaincode and Block Eventing.
Free Linux Foundation HFCP Exam Actual Questions
Note: Premium Questions for HFCP were last updated On Apr. 02, 2025 (see below)
After the transaction that contains the delState("A") function is committed, what happens to the ledger and state database?
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.
Which subcommand adds a peer to a channel in Hyperledger Fabric?
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.
Which of the following is the identity solution in Hyperledger Fabric?
In Hyperledger Fabric, the identity solution that manages user identities and authenticates participants on the network is facilitated by Membership Service Providers (MSPs). MSPs are crucial for defining the rules by which identities are validated, authenticated, and allowed access to the network. MSPs handle the issuance of certificates and define the roles and permissions associated with participant identities, enabling permissioned interactions on the blockchain. This differs from Hyperledger Fabric CA, which primarily issues and revokes certificates as part of identity management but is used in conjunction with MSPs to provide comprehensive identity solutions within the network.
What is true about the historic states in Hyperledger Fabric model?
Historic states in the Hyperledger Fabric ledger are immutable, meaning they cannot be altered after they have been committed to the ledger. This immutability ensures the integrity and traceability of all transactions on the network. Once a transaction is recorded, it is permanent, and its history can be audited to trace back all operations affecting any piece of data. This feature is fundamental in blockchain technology, providing a verifiable and tamper-evident record. The immutability of historic states is a key component of the trust and security model in Hyperledger Fabric, contrary to options that suggest these records can be modified or are inaccessible.
What is the advantage of using state-based endorsement policy over a chaincode or collection level endorsement policy?
State-based endorsement policies in Hyperledger Fabric offer a significant advantage by allowing endorsement policies to be specified at the level of individual state keys within the ledger. This granularity means that the endorsement policy for specific assets or data points can be tailored independently of others and can be updated without the need to redeploy or update the chaincode itself. This flexibility supports dynamic business needs and complex governance structures where different assets may require different endorsement levels based on their sensitivity or value .
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