Top 30 Hyperledger Interview Questions for 2021

Top 30 Hyperledger Interview Questions for 2021

Are you planning to prepare yourself for Hyperledger interviews and become a successful Hyperledger Expert? You have landed on the right page. This article talks about the top interview questions so that you can mentally prepare answers for them.

Excited? So let’s get started.

Table of Contents 

  • Top Hyperledger Questions You Should be Prepared for 
  • Concluding Lines: How to Learn and Become a Certified Hyperledger Professional 

Top Hyperledger Questions You Should be Prepared for 

  • What is Hyperledger?

It is an open-source global collaboration that helps in creating and developing enterprise-grade and distributed ledger frameworks to support business transactions and to advance cross-industry blockchain technologies, hosted by the Linux Foundation.

  • Is Hyperledger public or private?

It is a private blockchain. 

  • Enlist projects under the Hyperledger umbrella?

Hyperledger Fabric, Hyperledger Indy, Hyperledger Burrow, Hyperledger Iroha, Hyperledger Sawtooth, Hyperledger Besu, Hyperledger Caliper, Hyperledger Cello, Hyperledger Explorer, Hyperledger Avalon, Hyperledger Quilt, Hyperledger Ursa, Hyperledger Aries, Hyperledger Transact, and Hyperledger Grid. 

  • What are the major goals of Hyperledger?

  • The main aim of this technology is to create an enterprise-grade, open-source, distributed ledger framework to improve business transactions.
  • Next is to provide a community-driven, open infrastructure that is supported by technical and business governance. 
  • It aims at educating the crowd about the market opportunity for blockchain technology.
  • Distinguish between Hyperledger and Ethereum.

The major difference is that Ethereum is a public blockchain, whereas Hyperledger is permissioned and private. It is designed to create an enterprise-grade, open-source, distributed ledger framework to improve business transactions. Ethereum, on the other hand, runs the Smart Contracts on the EVM for applications that are attributed to being decentralized and are for mass consumption. Hyperledger is for a B2B business, whereas Ethereum is a B2C business. Another difference is that Ethereum utilizes Solidity programming language, whereas Hyperledger utilizes Golang. 

  • What is Hyperledger Fabric?

Fabric is one of the blockchain projects within Hyperledger that has a ledger, uses smart contracts, and offers a system by which participants can manage their transactions like other blockchain projects. It has a private and permissioned network whose modular architecture maximizes blockchain privacy, flexibility and eases decision-making capabilities.

  • What is Hyperledger Sawtooth?

Sawtooth is an open-source platform, a blockchain suit for developing, running, and creating new distributed ledgers. Sawtooth’s architecture is believed to be flexible and modular. It separates the core system from the application domain so that smart contracts can specify the business rules without needing to know the underlying design. This project aims at keeping ledgers distributed and making smart contracts safe for enterprise use.

  • What is Hyperledger Indy?

Like other Hyperledger projects, Indy is also a distributed ledger that comes with reusable components along with several tools and libraries, explicitly designed for identity-based solutions. It is a group of tools, libraries, and further components for digital identities rooted in blockchains.

As it offers an identity-based solution, that means one will have complete control over their identity, and no one can control it. This project is interoperable with other blockchains and also can be used standalone, powering the decentralization of identity.

  • What is Hyperledger Iroha?

Iroha is a distributed ledger software that offers varieties of libraries for developers, provides role-based access control, offers simple deployment and maintenance, and works on improving reliability, performance, and usability. 

  • What is a Hyperledger Quilt?

It is a Java implementation of the Interledger protocol. This project enables crypto and fiat payments across any payment network. It provides an implementation of all core primitives required to send and receive payments in a ledger-agnostic style. 

  • What is the Hyperledger Transact?

Hyperledger Transact is a library that aims to reduce the development effort in writing distributed ledger software by providing a standard interface that let’s execute smart contracts, including all aspects of scheduling, transaction dispatch, and state management.

  • What is Hyperledger Besu?

It is an open-source Ethereum client developed under the license of Apache 2.0 and uses java programming language. Besu is an enterprise-focused initiative that can be run on either of the networks, i.e., public and private permissioned networks, along with test networks such as Rinkeby, Gorli, and Ropsten.

  • What do you know about Hyperledger Fabric 2.0?

Fabric 2.0 has introduced various features in its latest version. These are as follows: 

  • Decentralized governance for smart contracts 
  • New chaincode lifecycle
  • New chaincode application patterns
  • Automated checks
  • Decentralized agreements
  • Private data enhancements 
  • New smart contract launcher
  • Decentralized ordering service
  • Introduction of fabtoken
  • Multiple chain codes on a channel
  • Performance enhancements
  • Can you name some of the top healthcare projects powered by Hyperledger?

  • MELLODDY Project
  • Axuall Project 
  • KitChain 
  • What are the Nodes and Channels in Hyperledger Fabric?

    The communication entries in Hyperledger are nodes, and the subnet of a Hyperledger network is known as the channel. 

  • Chaincode is written in which language?

It is written in multiple languages, including Golang and Java SDK. 

  • What are the types of nodes in Hyperledger Fabric?

There are three types of nodes:

  1. A client that submits a real transaction-invocation and broadcasts transaction-proposals to the ordering service.
  2. A peer node is a node that commits transactions and maintains the state and a copy of the ledger.
  3. Ordering-service-node is a node running the communication service that implements a delivery guarantee.
  • Explain Hyperledger Burrow?

Burrow is a fully-fledged blockchain node and smart contract execution engine that focuses on simplicity and speed. Burrow runs and executes Ethereum Virtual Machine and Web Assembly (WASM) smart contracts and are synchronized using the Tendermint consensus algorithm. It is an open platform that is mainly optimized for public and permissioned Blockchain; however, it can also be used as private blockchains.

  • Explain the RBFT consensus mechanism, which is used in Hyperledger Indy. 

RBFT stands for Robust Byzantine Fault Tolerance (RBFT) and is inspired by Plenum Byzantine Fault Tolerance (Plenum). It has a pluggable election strategy, and it is set to a permissioned, voting based strategy by default. All instances do ordering, but the requests ordered by the master instance are actually executed. This consensus provides Byzantine fault tolerance. The only drawback is that the more nodes that exist on the network, the more time it takes to reach a consensus. 

  • Does Hyperledger use Proof-of-Work?

No, it does not use Proof-of-Work consensus, and this is the reason why it is fast and energy-efficient as well.

  • Explain what Hyperledger Explorer is?

This is a user-friendly web application tool that provides enterprise-level visualizations that helps decision-makers through intuitive graphs, tables, etc. It is used for viewing or invoking transactions and other crucial information stored in the ledger.

  • What is Hyperldger Caliper?

Caliper is a Blockchain performance benchmark tool for Besu, Fabric, Ethereum, and FISCO BCOS networks that allows users to measure the performance of a blockchain implementation with a set of predefined use cases. 

  • What is Hyperldger Cello?

Hyperledger Cello is a blockchain provision and operation system that aims to serve as the operational dashboard for Blockchain, which reduces the effort required for creating, managing, and using blockchains. 

Moreover, Cello manages the complete lifecycle of blockchain networks, supports customized blockchain network config, and extends with advanced features as well. 

  • What is Hyperledger Grid? 

Grid is a supply-chain-centric reference implementation solution. This project provides a set of modular components for developing smart contracts and client interfaces and also showcases how to combine components from the Hyperledger stack into a single, effective business solution.

  • What is Kafka in Hyperledger Fabric?

 It is a permissioned voting-based consensus mechanism where a leader does the ordering, and only in-sync replicas can be voted as a leader.

The advantage is that it provides crash fault tolerance, and finality happens in just a few seconds. The major drawback is that it is not Byzantine fault-tolerant, which prevents the system from reaching an agreement in the case of faulty nodes.

  • Mention some of the applications of Hyperledger Fabric.

  • Supply Chain Traceability 
  • Digital Identity
  • Real-estate Transactions
  • Music and Media Rights and much more.
  • What are the advantages of Hyperledger?

  • Permission membership
  • Performance, scalability, and levels of trust
  • Data on a need-to-know basis
  • Rich queries over an immutable distributed ledger
  • Protection of digital keys and sensitive data
  • Modular architecture supporting plug-in components
  • What is solidity? 

Solidity is an object-oriented programming language for writing smart contracts for several different Hyperledgers platforms.

  • What is Hyperledger Aries?

Aries is an infrastructure for peer-to-peer(P2P), blockchain-routed interactions. This project helps in the exchange of blockchain-based data that facilitates interoperable interaction between several distributed ledger technologies and other blockchains and supports P2P messaging in various situations.

  • Which is the best Hyperledger project according to you?

While all the projects are geared towards industrial use, selecting the appropriate framework is a matter of choice that varies as per business needs. Each frame has its features making it more beneficial for one niche while less serviceable for others. 

Concluding Lines: How to Learn and Become a Certified Hyperledger Professional 

If you are looking to upskill yourself in this technology, we are here to help you learn and become an industry-ready Professional. The certifications provided by the globally renowned online platform, Blockchain Council, give an in-depth knowledge of all the frameworks of Hyperledger.

The platform is known to provide the two most in-demand certifications, such as Certified Hyperledger Developer and Certified Hyperlegder Expert.

Certified Hyperledger Developer Training is excellently designed and carefully curated by experts to render a profound understanding of Hyperledger Fabric and Composer. Beginning right from the basics of Hyperledger Fabric to the fundamentals of Fabric architecture, the course covers all theoretical and practical aspects of this technology. 

Talking about Certified Hyperledger Expert, this certification will cover all the details regarding the architecture of Fabric and composer and will also help you to understand the hyperledger family, so you can begin building blockchain applications on top of the hyperledger platform.

So are you ready to open the world of excellent career opportunities in the Blockchain domain? If yes, why wait? Get enrolled in the Blockchain certification and become a Certified Blockchain Expert

To get instant updates about Blockchain Technology and to learn more about online blockchain certifications, check out Blockchain Council.

Top 30 Hyperledger Interview Questions for 2021