Top 20 Hyperledger Interview Questions and Answers

Hyperledger is an umbrella project of open-source Blockchain which was started in December 2015. It was founded by Linux foundation. It is the hottest tech space in the industry right now. This makes it obvious that lots of techies would desire to get a job in this field. To help you fulfil your desire, we have come out with the most important questions that you must know the answer to for cracking any interview:

1. What is Hyperledger?

Hyperledger is an umbrella project which was designed by Linux foundation in the year 2015. Some of the projects that have adopted Hyperledger are NodeJs, Alljoyn, Dronecode work on this platform where there is a community of developers working on open-source projects. The main advantage of Hyperledger is that it allows multiple private chains to run in a separate market.



 

2. What is Hyperledger Fabric?

Hyperledger Fabric is a kind of Blockchain project within the Hyperledger platform. Just like other Blockchain technology platform, it has a ledger and a smart contract. It is a decentralized system that is used to manage the transactions of the participants.

 

3. What is the Advantage of Hyperledger?

These are the following advantages of hyperledger :

  • Permission membership

Hyperledger Fabric is a framework of the authorized network where every single participant has known identities. When considering permission work, you should think about if your blockchain use case needs to comply with the data protection regulation or not. Cases are used in the banking and financial sectors, health care industries. They are subject to data protection laws that require the identity of the involved members of the network.

  • Performance, scalability, and levels of trust

Hyperledger Fabric is built on a modular architecture that separates transaction processing into three different phases: distributed logic processing and agreement, transaction ordering, and transaction validation and commitment.  This separation of the components gives several advantages.

  • Data on a need-to-know basis

Nowadays privacy is a key function of a successful business and it is due to competitiveness, protection laws, and confidentiality of personal data. This privacy can be achieved through data separation on the blockchain. The channels of hyperledger fabric allow only the concerned parties to know the data.

  • Rich queries over an immutable distributed ledger

The hyperledger is a sequenced record of state transitions for the blockchain platform. Every transaction generates an asset key-value pairs that are related to ledgers.

4. What is Hyperledger Explorer?

Hyperledger Explorer is a kind of blockchain module and a hyperledger project which is hosted by the Linux Foundation. It is designed to create a user -friendly web application. Hyperledger Explorer can view, invoke, deploy, transaction, transaction families, and other information stored in the ledger.

5. What is Hyperledger Indy?

Ans: Hyperledger Indy is a set of special tools to uphold the digital identity in a hyperledger platform.

6. What is Hyperledger Sawtooth?

This is a kind of modular blockchain suite which is developed by Intel that uses a new algorithm which is called proof of elapsed time (PoeT). It is written under Python and designed for the use case in fields like IoT and Financials. It supports both approval and permissionless application and deployments and it is one of its dominant features.

7. What is Hyperledger Indy?

Hyperledger Indy is a collection of tools, libraries and further components for digital identities rooted on blockchains.

8. What is Hyperledger Iroha?

Iroha is a joint venture of Japanese companies that aims at the creation of a flexible for a blockchain.

9. What is Hyperledger Burrow?

Hyperledger burrow is a project that develops a permissible smart contract machine with the specifications like the Ethereum

10. What is the Difference Between Hyperedger and Ethereum?

The most evident difference between the two is the reason for their formation. Ethereum runs the smart contracts dece centralized apps over EVM whereas the hyperledger uses the blockchain technology for business purpose.

11. Name the Components of Hyperledger Fabric?

There are two components of Hyperledger fabric:

  • State data
  • Transactions log

 

12. What is a YAML file?

YAML file is present within the Hyperledger Fabric and Docker context. It is a configuration file that determines how the Fabric network and the Docker should perform a specific task.

13. What is LevelDB in Hyperledger Fabric?

The ledger system in Hyperledger Fabric uses LevelDB database by default.

14. Hyperledger Chaincode is Written in Which Language? Name Them

Chaincode may be written in any of the three languages, namely, Peer Node, Orderer Node and Client Node.

15. What is Channel?

Channel in a Hyperledger Fabric is the subnet of the main blockchain and  You can create multiple Channels in a Blockchain depending upon your need.

16. What is a Chaincode in Hyperledger Fabric?

Is the smart contract that runs on the peers. It is also used to create transactions.

17. Give Some Differences Between a Traditional Database and Hyperledger Database

The difference between a traditional database and Hyperledger database is:

  • Storage of Records: In a traditional system the records are centralized and in the Hyperledger system the records are decentralized.

 

  • Operations Done: In hyperledger system, you can only conduct insert operations whereas in the traditional system you can read, edit, create and update all the transactions.

 

  • Validations of transactions: You can validate multiple transactions on hyperledger whereas in the traditional database only certain chosen nodes are allowed to validate the transactions.

 

18. What are The Challenges Faced During Information Processing?

One of the most general problems is to secure the information during its transfer. Another challenge is the processing of bulk load data which affects the performance and quality of performance.

 

19. What is Solidity? What are the Languages Used to Write Smart Cases?

Solidity is a programming language which is used for generating Smart contracts for several different Hyperledgers platforms. Smart Contract is generally generated in Solidity, Serpent, and Lisp languages.

20. What is a Genesis Block?

The very first block that is generated in a hyperledger is called genesis. All the transactions are later added to the genesis block after verification.

 

 

Conclusion

The questions and answers discussed above are a mixture of beginner to expert level. They are designed specifically for a Hyperledger interview and can be effectively used in any interview session.