Which concept of the RAFT ordering service relates to the ingestion of new log entries; their replication to other ordering nodes; and managing when an entry is considered committed?
Answer(s): D
In the RAFT ordering service within Hyperledger Fabric, the concept of the "Leader" is crucial for the ingestion of new log entries, their replication to other ordering nodes, and managing when an entry is considered committed. In a RAFT-based ordering service, the leader node is responsible for managing the log entries; it receives all client requests, appends them to its log, and replicates these logs to the follower nodes. The leader also plays a crucial role in ensuring that there is a consensus on the order of transactions before they are committed to the ledger. The leader is dynamically elected by the cluster nodes and can change due to network conditions or node failures. This role is pivotal in the RAFT consensus mechanism for maintaining a consistent and reliable ordering service.
Which pluggable component in the Hyperledger Fabric modular architecture is responsible for identities?
Answer(s): B
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.
When executing queries on the ledger, what is the difference between simple and composite keys?
Answer(s): C
In Hyperledger Fabric, when executing queries on the ledger, the difference between simple keys and composite keys is significant. Simple keys consist of a single attribute and are straightforward in their use for querying. In contrast, composite keys are formed by combining multiple attributes into a single key, allowing for more complex queries based on multiple fields. Composite keys enable richer, more flexible query capabilities that can facilitate refined searches and analyses within the ledger. This capability is particularly useful in scenarios where a single attribute is not sufficient to uniquely identify ledger entries or when queries need to filter based on multiple criteria.
The Gateway service manages which of the following activities on behalf of the client application?
In Hyperledger Fabric, the Gateway service manages the transaction submission process on behalf of the client application. This service simplifies the interaction with the network by abstracting the details of transaction construction, endorsement, and submission. The Gateway service assembles the necessary endorsements according to the relevant chaincode endorsement policies and submits the transaction to the ordering service. This role of the Gateway enhances the usability and efficiency of transaction processing, reducing the complexity for client applications by handling these critical steps internally.
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PC commented on October 26, 2024 Good content Anonymous upvote
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