Hyperleder Febric Interview Questions And Answers

What is Hyperledger Fabric?

Hyperledger Fabric is an open-source blockchain platform developed by the Linux Foundation. It provides a modular architecture and features like privacy, scalability, and permissioned governance, making it suitable for enterprise blockchain solutions.

How does Hyperledger Fabric handle privacy and confidentiality?

Hyperledger Fabric allows for private channels, where only selected participants have access to the transactions and data within that channel. It also supports private data collections, which enable specific organizations to hold private data off the shared ledger.

What are the key components of Hyperledger Fabric?

The key components of Hyperledger Fabric are:

Peer Nodes: Nodes that maintain the shared ledger and execute chaincode.
Orderer Nodes: Nodes that manage the ordering of transactions and the creation of blocks.
Channel: A private communication pathway for specific participants to transact privately.
Smart Contracts (Chaincode): Programs that define the business logic of transactions.
Membership Service Provider (MSP): Manages identities and access control.

How does Hyperledger Fabric achieve consensus among nodes?

Hyperledger Fabric uses a pluggable consensus mechanism. By default, it supports the Practical Byzantine Fault Tolerance (PBFT) consensus algorithm, but it also allows other consensus mechanisms like Raft or Kafka to be used based on the network requirements.

What is a Chaincode in Hyperledger Fabric?

Chaincode in Hyperledger Fabric refers to the smart contracts or programs that define the business logic of transactions. Chaincode is written in a supported programming language, such as Go or Node.js, and executed by the peer nodes.

How does Hyperledger Fabric handle scalability?

Hyperledger Fabric achieves scalability by using a modular architecture. It allows the creation of multiple channels for different sets of participants, reducing the amount of data each node needs to process. Additionally, it supports parallel execution of transactions within a channel.

What is the role of a Certificate Authority (CA) in Hyperledger Fabric?

The Certificate Authority (CA) in Hyperledger Fabric is responsible for managing and issuing digital certificates to network participants. It ensures secure authentication and controls access to the network by validating and revoking certificates.

Can Hyperledger Fabric interact with other blockchain networks or systems?

Yes, Hyperledger Fabric can be integrated with other blockchain networks or systems through interoperability protocols like Interledger Protocol (ILP). This allows for seamless communication and data exchange between different blockchain platforms.

How does Hyperledger Fabric handle permissioned governance?

Hyperledger Fabric employs a permissioned governance model, where network participants are known and vetted. The governance model includes policies and rules defined by the consortium or organization running the network to manage access, membership, and decision-making.

What are the advantages of using Hyperledger Fabric over public blockchains?

Some advantages of Hyperledger Fabric over public blockchains are:

• Privacy and confidentiality for enterprise use cases.
• Scalability and performance optimizations.
• Permissioned governance for trusted networks.
• Modular architecture for customization and flexibility.
• Integration capabilities with existing enterprise systems.