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Best Blockchain Courses for Blockchain Development

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Best Blockchain Courses for Blockchain Development

Want to become a Blockchain Developer but don’t know how to get started? Well, we have got you covered. This article enlists the best Blockchain courses for Blockchain development and guides how to become one.

Table of Contents 

  • Why Learn Blockchain Development 
  • Top In-Demand Blockchain Certification Courses
  • Concluding Lines: How to Learn Blockchain Development

Why Learn Blockchain Development

Since its introduction in 2008, Blockchain has continued to gain a reputation and has become increasingly useful in a lot of sectors. Along with having its application in cryptocurrency, technology is also proving to be useful in almost all sectors such as governance, supply chain, healthcare, cybersecurity, logistics, and many others.

If you are wondering why you should learn this emerging technology, here is a list of compelling reasons.

The top-most reason for learning this technology is that there is a high demand for Blockchain Professionals.  If you think you have the right skill sets to work in this space, you might be able to swim in the sea of high packages jobs. 

The other reason is that it is a cutting-edge technology that has the potential to revamp almost all sectors, including finance, supply chain, retail, eCommerce, and others.

Multiple career options and high ranking salaries are other crucial reasons why you should learn development in this space. It has been found that the salaries of professionals and experts are comparatively high due to their extreme shortage.

Top In-Demand Certification Courses

  • Certified Blockchain Developer

A Certified Blockchain Developer(CBD) is a professional who understands this technology profoundly and can build Blockchain-based applications. CBD is exhaustive training, an exam-based program aiming to impart in-depth practical knowledge in this space. A developer specializes in creating and implementing technical solutions with Blockchain Technology.

The course helps in building your own Blockchain with acquired knowledge, helps you learn Solidity language & multiple technology-based developments, and grasp the in-depth understanding of this technology, smart contracts & how it works, and much more.

  • Certified Hyperledger Developer

The Certified Hyperledger Developer Training is excellently designed and carefully curated by experts to render a profound understanding of Hyperledger Fabric and Composer. This certification equips individuals with the essential knowledge and expertise to work as a Hyperledger Developer. The training covers the introduction to Hyperledger Fabric, concepts and fundamentals of the fabric architecture, how to design the framework of Hyperledger Composer, and its application lifecycle management, and much more. The course helps you build your Private-Permissioned Blockchain businesses with acquired knowledge.

  • Certified Corda Developer

A Certified Corda Developer is one who possesses immense skill and knowledge in helping enterprises build interoperable Blockchain networks, thereby providing the luxury of carrying out business transactions over a private and secure network. 

The course covers the fundamentals and requirements of Corda, how to craft a Corda network, and you will learn all about the tools, plugins, and languages that are a prerequisite for crafting a Corda node and network. Moreover, you will get in-depth knowledge of structuring, creating, building, debugging, and signing of a CorDapp.

  • Certified Quorum Developer

Certified Quorum Developer certification is designed to render knowledge on Quorum from very basics to advanced level. The certification covers topics such as Quorum ecosystem, Quorum Network, Quorum Transaction processing, and privacy, Quorum Contracts, Quorum consensus, Setting up a quorum environment, and more.

Quorum development is a highly sought after skill as Quorum addresses specific challenges to Blockchain technology adoption within the financial industry. The certification course helps you prove your skills as a Quorum Developer and enhance your knowledge of Quorum, thus helping individuals in beginning a rewarding career as a Quorum Developer.

  • Certified Solidity Developer

    A Solidity Developer is one who uses the object-oriented Solidity language to build and deploy smart contracts on ethereum based applications. It is an exclusive exam-based certification, developed with the aim to offer a comprehensive knowledge of smart contract development through solidity.

A Solidity Developer is one who uses the object-oriented Solidity language to build and deploy smart contracts on ethereum based applications. 

Certified Solidity Developer Certification is an exclusive exam-based certification, developed with the aim to offer a comprehensive knowledge of smart contract development through solidity. Earning this certification will entitle you to become a smart contract developer, which is an extremely in-demand skill in the international job market.

  • Certified Smart Contract Developer 

A Certified Smart Contract Developer is a skilled professional who understands and knows deeply what Smart Contracts is and how to create them wisely over any Blockchain platform by programming it over Solidity. This certification offers exhaustive training & an exam-based program that aims to provide proof-of-knowledge of the certificate holder in the development phases of Smart Contract creation. This certification will work as a bridge between resources & businesses (employees, consultants & advisors) to give enterprises confidence in the quick hire.

Concluding Lines: How to Learn Blockchain Development

Learning in this space has been made easy. All thanks to tutorials and online platforms. There are various ways to learn this technology like you can enroll in Blockchain Council and become a Certified Blockchain Developer.  

Backed by the extensive practical-based sessions, Blockchain Council offers online training and certifications to aspiring trainees to render the desired competence to have a successful career in this space. This online platform  offers the most in-demand certification, specifically in the crypto and Blockchain field. Attending webinars and joining Blockchain communities can also prove to be helpful.

If you want to get started with Blockchain, get started today!

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

Best Blockchain Courses for Blockchain Development

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A Comprehensive Guide on Amazon Managed Blockchain

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A Comprehensive Guide on Amazon Managed Blockchain

This article provides a comprehensive guide on what Amazon Managed Blockchain is, explaining its benefits and AWS availability of Ethereum on Amazon Managed Blockchain.

Table of Contents 

  • What is Amazon Managed Blockchain?
  • Benefits of Amazon Managed Blockchain
  • AWS Availability of Ethereum on Amazon Managed Blockchain
  • Concluding Lines 

What is Amazon Managed Blockchain?

For all Blockchain beginners, Blockchain is a peer-to-peer(P2P) decentralized distributed ledger technology that records transactions in an immutable manner. Technology allows developers to build applications where various parties can carry out transactions in parallel without relying on a central authority.

Although this might sound fascinating, it is important to note that Blockchain’s scalability still remains one of the prime issues. In fact, building a scalable blockchain with existing technologies is a complex task.

Managed Blockchain is a completely managed service that empowers users to join public networks and maintain and manage scalable private networks with just a few clicks. Instead of manually installing software, creating and managing certificates for access control, and configuring networking components, continuously monitor the infrastructure, and adapt changes when required, one can rely on Amazon Managed Blockchain as it makes it easy to maintain your Blockchain network. 

The significant benefit of this Blockchain is that it eradicates the overhead that is required to create the network, and, most importantly, it automatically scales in order to meet the requirements of thousands of applications performing millions of transactions. 

Are you looking for futuristic career opportunities in the Blockchain space? Get started today with the best Blockchain Certification courses. 

Benefits of Amazon Managed Blockchain

Let’s have a quick look at the advantages of Amazon Managed Blockchain.

Fully managed

Amazon Managed Blockchain assists in the creation of blockchain networks spanning several AWS accounts, allowing a group of people to perform transactions and exchange data without the need for a central authority. It also removes the need for manual provisioning of hardware, device setup, and networking and security configuration.

Offers two Different Blockchain Platforms

Initially, Managed Blockchain supported only Hyperledger Fabric, but now customers can choose either Hyperledger Fabric or Ethereum, depending on their needs.  

Scalable

This particular Blockchain has the potential to scale your blockchain network depending on the usage of applications on the network. This Blockchain has the ability to scale your blockchain network based  It means that if a network user requires additional capacity for making and validating transactions, he can instantly use Managed Blockchain’s APIs to add a new peer node. 

Reliability

Managed Blockchain aims to improve the reliability of the ordering service, which is a component in the Hyperledger Fabric that ensures delivery of transactions, although it’s difficult to keep track and recover the entire transaction history. Managed Blockchain’s ordering service is built using special Amazon QLDB technology and has an immutable change log, which guarantees that the data is durably saved.

AWS Availability of Ethereum on Amazon Managed Blockchain

Initially, in 2019, Amazon announced the general availability of its fully managed blockchain service, and after two years, recently in March 2021, Amazon announced its extended services, mentioning its general availability of Ethereum on Amazon Managed Blockchain. Thus, with this announcement, Amazon Managed Blockchain presents the selection of two different blockchain platforms including, Hyperledger Fabric and Ethereum. 

Let’s talk a little bit about Etherum and Hyperledger Fabric here. 

Hyperledger Fabric is an open-source enterprise-grade permissioned DLT platform that is known to provide modularity and versatility for a broad set of industry use cases, including banking, insurance, healthcare, supply chain, human resources, etc. It is well suited for applications with rigorous privacy and access control. 

Talking about Ethereum, it is an open-source platform for decentralized applications and is better suited for highly distributed networks where data transparency is critical. It enables a successful use case, and that is decentralized finance (DeFi) that is gaining a lot of momentum and showing no sign of slowing down. 

But when it comes to operating and managing Ethereum infrastructure, its not easy as there are various concerns, including data reliability, data storage scaling problems, and time-sensitive Ethereum software upgrades.

Now that Amazon has made Ethereum on Managed Blockchain generally available, consumers of AWS can easily provision Ethereum nodes and link to the public Ethereum main network and test networks such as Rinkeby and Ropsten.

Amazon Managed Blockchain helps customers in a number of ways. For instance, they can get:

  • secure and reliable networking 
  • reliable access to the network via standard open-source Ethereum APIs
  • reliable synchronizations to the Ethereum 
  • durable and flexible storage for data. 

Developers building smart contract monitoring tools and fraud detection apps can now reap the benefits from fully managed Ethereum service on Amazon Managed Blockchain. According to Amazon, Ethereum nodes are fully integrated with the AWS management console, which permits the creation or deletion of a node and regains information about running nodes. 

It was explained by Amazon that,

“Ethereum on Managed Blockchain only supports the eth_sendRawTransaction method, which demands that you create and sign the transaction before sending it to the node. Managed Blockchain does not have any way to sign transactions similar to an Ethereum wallet application.”

Concluding Lines 

This has led us to the end of our discussion. Hope you have gained a clear understanding of Amazon Managed Blockchain. 

If the Blockchain domain interests you, you can get enrolled in Blockchain Council 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.

A Comprehensive Guide on Amazon Managed Blockchain

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Demand Gap for Blockchain Talent Requires Top Rated Education

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Demand-Gap-for-Blockchain-Talent-Requires-Top-Rated-Education

If you are a Blockchain enthusiast, you must be aware about its talent scarcity. In this article, we will explore what are the top-rated educational ways that can help in bridging the gap for Blockchain talent. So let’s get started.

Table of Contents 

  • The Growing Shortage of Blockchain Talent 
  • Blockchain Job Market is Booming 
  • Role of Education in Bridging the Gap
  • Conclusion: Career Building Opportunities with Blockchain Council

The Growing Shortage of Blockchain Talent 

Technology that was once considered to be overhyped is now recognized as a promising innovative technology. Since its introduction into the mainstream with other emerging technologies such as AI, IoT, and others, Blockchain developers and technocrats have found it revolutionary. Although the technology is maturing at a rapid rate, the growing shortage of blockchain professionals is a well-documented concern all around the world.

At present, there has been an unparalleled demand for blockchain developers. Major tech giants, including Google, Microsoft, IBM, and other well-known enterprises and even startups, have started leveraging Blockchain technology, but they are struggling to find sufficient talent. 

Blockchain Job Market is Booming 

The salaries of Blockchain professionals are going off the charts. This is because of the fact that demand is highly outweighing the supply. Currently, Blockchain talents are in demand in the BFSI sector and almost in all sectors of the economy, including government institutions, federal agencies, healthcare, manufacturing, automobile, art and music supply chain, gaming, and much more.

Due to continuous efforts by Blockchain developers and experts, today, Blockchain is a matured technology that offers futuristic career opportunities to all enthusiasts. Compared to other IT professionals such as Machine Learning Experts, AI Developers, Data Scientists, Blockchain Professionals salaries stand out exceptionally well. 

According to job recruitment firm Hired.com, the average blockchain developer salary ranges from $150,000 to $175,000 per year in the US’s hi-tech regions, such as Silicon Valley whereas, Glassdoor reports that the average base salary of a blockchain developer in the US is $91,715/yr. 

Role of Education in Bridging the Gap

Initially, the market for blockchain talent was hampered by a lack of knowledge of the technology and limited resources accessible to professionals. However, this aspect has changed over the last couple of years. Companies that were struggling to find adequate talent have started their own educational programs. In order to cope up with the talent scarcity, online programs, university courses, and workshops are popping up at an exciting rate.

Let’s explore some of the best educational ways.

  • Truffle Suite and Hyperledger Fabric Document 

To educate learners about Blockchain technologies, there are online platforms such as Truffle suite and Hyperledger Fabric. Truffle Suite is an open-source framework that provides an in-depth, in-depth understanding of blockchain platforms, libraries, tools, etc. Similarly, Hyperledger Fabric Documentation offers online documentation that provides numerous tutorials at beginner’s level, covering architecture reference, operational guide, and much more, enabling learners to learn and progress.

  • Blockchain Council Certifications 

Backed by the extensive practical-based sessions, Blockchain Council offers Online training and certifications to aspiring students to render the desired competence to have a successful career in the Blockchain/crypto domain. It imparts most in-demand Blockchain certifications in various Blockchain technologies, including Bitcoin, Ethereum, Hyperledger, Quorum, and Corda. 

  •  In-house and Self-Paced Blockchain Training

Companies are currently looking to integrate blockchain-focused solutions, and for this, they are providing in-house training to build up the skill sets required for their organization. Such training helps employees address specific business needs and provide Blockchain-focused solutions for business growth. 

  • Self-paced training sessions have also started getting public attention because they are convenient, cost-effective, allow better focus, and of course, enhance the learning experience. There are many organizations that are offering Blockchain self-paced training to help the learner understand all the ins and outs of blockchain technology, including smart contract, Blockchain mining, its security and privacy, use-cases across various domains, and much more. 

To explore more about self-paced Blockchain training, checkout Blockchain Council. 

  • Blockchain-Based Communities and Webinars 

For a great initial experience, Blockchain communities and webinars can prove to be beneficial. These can help in providing effective platforms for communication and can even open vast opportunities for earning money. Apart from these, such platforms can facilitate communal support and engagement. For instance, the Blockchain Council Community is delivering education all around the world. Similarly, Cointelegraph, Blockchain News can keep you updated about the Blockchain and Crypto domain. 

Conclusion: Career Building Opportunities with Blockchain Council

As Blockchain is maturing, there’s an extensive professional network to help you become a successful Blockchain Professional. Enrolling in Blockchain Council, a globally recognized online platform, can help you gain in-depth knowledge of functional and technical aspects of Blockchain technology. Blockchain Council Certifications will not only prove to be your competitive advantage; instead, it will help you gain confidence in the quick hire. 

Blockchain Council has proved to be successful in creating a successful future for millions of people all around the world. If you want to give your career a head start, this is a one-stop solution.

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

Demand Gap for Blockchain Talent Requires Top Rated Education

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Top 30 Hyperledger Interview Questions for 2021

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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 
  • MyClinic.com
  • KitChain 
  • Verified.me 

  • 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

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Prepare Yourself With These Top 30 Blockchain Interview Questions 2021

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Prepare Yourself With These Top 30 Blockchain Interview Questions 2021

Want to have a career in the Blockchain space? This article talks about the top 30 interview questions to get you ready for a big interview. Excited? Let’s get started.

Table of Contents 

  • Top Interview Questions You Should be Prepared for
  • Wrapping Up: How to Learn Blockchain?

Top Interview Questions You Should Know

In this section, let’s discuss the top 30 blockchain questions and answers.

1. What is the difference between Bitcoin Blockchain and Ethereum Blockchain?

Both Bitcoin and Ethereum have decentralized distributed databases of immutable records. But Bitcoin and Ethereum differ in purpose in a way that Bitcoin is considered as an alternative digital currency that offers various advantages, whereas Ethereum is regarded as the king of smart contracts that facilitates Peer-to-Peer contracts and applications via its own currency known as ETH. Ethereum was introduced with an intent to complement rather than compete with bitcoin.

2. How is Blockchain different from traditional databases?

A database is a kind of central ledger, whereas Blockchain has a distributed ledger, which means unlike the traditional databases, it is not governed by any central server. Due to this, Blockchain is a fully confidential and robust technology.

3. What is double-spending, and how can it be stopped?

It is the process of spending a balance of that cryptocurrency more than once. It is done by fooling the network to think that the original amount is never spent, thus making it available to be used for multiple transactions. 

However, this problem can be prevented in blockchain-based cryptocurrencies by utilizing a consensus mechanism known as Proof-of-Work (PoW).

Bitcoin’s solution to deal with this crucial problem is that if the majority of the nodes agree on which transaction was first to be received, later tries to double-spend are pointless.

4. Out of the three types of Blockchain, which is the best one?

Out of public, private, and consortium Blockchain, to state which one is the best would not be right because each of has its own features, usage, and requirements. If you want to design and implement your own enterprise blockchain, a private blockchain is a one-stop solution. Consortium blockchain, on the other hand, is likely to interest organizations who want to efficiently streamline communication among one another.

Features  Public  Private  Consortium 
Accessibility  Anyone  Single Person/ Central Incharge  More than one central in-charge.
Who can join? Anyone  Permissioned and known identities Permissioned and known identities
Consensus Mechanism PoS/PoW Voting or multi-party consensus algorithm Voting or multi-party consensus algorithm
Transaction Speed  Slow  Lighter & Faster  Lighter & Faster 
Decentralization Completed Decentralized  Less Decentralized  Less Decentralized 

5 How ICO differs from IPO?

ICO stands for Initial Coin Offering, whereas IPO stands for Initial Public Offering. The first difference between an ICO and an IPO is that ICO is generally for the young and risky, whereas IPO is mainly for well-settled companies. The process of issuing also differs in both. An IPO is an extensive process that requires underwriters and lengthy evaluations to determine the market price of each share. Moreover, for an IPO, you need lawyers, banks, and patience, whereas, for ICO, one needs programmers and the Internet. 

6 Name a few popular platforms for developing Blockchain-based applications?

There are multiple platforms available but before deciding on one, understand what type of Blockchain do you need, how popular is the chosen platform, what kind of scalability does your solution need, and ensure whether your preferred blockchain platform supports smart contract functionality or not. 

Blockchain platforms enable the development of blockchain-based applications that are in great demand and useful for businesses and enterprises. A few of the top platforms for developing Blockchain-based apps are Hyperledger Fabric, Ethereum, R3 Cords, Quorum, and Ripple.

7 What do you know about the lightning network?

It is an off-chain, micropayment system designed to make transaction processing faster in the Blockchain. In Lightning Network, the members can directly interact with each other without offering anything to the miners, and members can engage in numerous microtransactions with each other. And finally, when the payment channel is locked, the concluding transaction set is added to the Blockchain.

Lightning network not only helps in scalability but also makes payments instantaneous, and transactions are not dependent on miners. The network is micropayment and multi-signature friendly and, moreover, reduces the load of the main chain and decreases waiting time.

8 Distinguish between Fungible and Non-Fungible.

  • Fungible are Interchangeable: Fungible tokens are interchangeable and can be exchanged with any other token of the equivalent kind. 
  • Non-Fungible are Non-Interchangeable: Unlike Fungible tokens, such tokens are non-interchangeable as they cannot be replaced with the non-fungible token of the same type.
  • Fungible Tokens are Uniform: Each token is different from all other tokens of the same type. 
  • Non-Fungible Ones are Unique: All tokens of each type are identical in specification, and each token is identical to the other. 
  • Fungible Tokens are Divisible: These tokens can be divisible into smaller units, and one can get any number of units, and it does not matter to holders as long as the value remains the same.
  • Non-Fungible Tokens are Non-Divisible: These tokens cannot be divided in any sense.  

9 What is Blockchain Wallet?

A blockchain wallet can be defined as a digital wallet or E-wallet that allows individuals to store, manage, and transfer their cryptocurrencies such as Bitcoin(BTC), Ethereum(ETH), and many more. With such wallets, users can manage their balances of these two cryptocurrencies by paying transaction fees that depend on various factors such as transaction size. Since digital assets or cryptocurrencies are just a number, that is why the wallet keeps the private key of any particular individual, and the private key fetches the balance of that individual from the Blockchain.

10 Explain the features of DeFi.

  • Autonomy — DeFi platforms ensure that your assets are all yours, and no one has control over them.
  • Enables affordable and faster cross border payments
  • Tradability — You can trade more efficiently as they aren’t prone to an entire high-value investment at once.
  • Accessibility: DeFi has a financial system that is accessible to everyone regardless of their location.
  • Interoperability: DeFi apps and protocols are built to integrate and complement one another.
  • Transparency — In the DeFi environment, data is available publicly, which helps keep service providers impartial.
  1. Question: What are the requirements for implementing Blockchain technology for enterprise usage?

Answer: Here are the most basic ones:

  • Is the network peer-to-peer? 
  • Does the system offer smart contract functionality for the execution of decentralized applications or not? 
  • Can data be stored permanently without compromising the security measures?
  • Does it offer decentralized data storage?
  • What are its data privacy aspects? 
  • Is the immutability ensured?

12 Question: What is blockchain mining? 

Answer: Blockchain mining is a process by which transactions of a blockchain are verified without involving any third-party. Every time a transaction is sent from a Bitcoin wallet, it is sent to the transaction pool. Miners then pick hundreds of transactions and combine them to form a block with other overheads like Merkel Root, SHA-256 Hash, Nonce, etc. 

13 List some of the top blockchain development tools. 

  • Solidity
  • Remix
  • Geth 
  • Meta Mask
  • Truffle Framework

14 What, according to you, are the key Challenges for Blockchain Adoption

  • Scalability 
  • Interoperability 
  • Energy Consumption 
  • Lack of Talent 
  • Lack of standardization 

15 What are the drawbacks of Blockchain?

It is a complex technology that is hard to understand and implement. Scalability is another issue related to Blockchain. Moreover, network speed and transaction costs vary, and human errors still persist. 

16  Is it possible in Blockchain to remove one or more blocks from the networks?

No, it is not possible to manually remove a block. However, blocks can be removed with the help of default options and filters. Deleted blocks can be re-downloaded again whenever needed.

17 Enlist key features of Blockchain technology.

Transparency– Transparency is one of the significant issues in the current industry. Although to improve it, organizations have attempted to implement more rules and regulations, but there is one thing that doesn’t make any system completely transparent,i.e., centralization. But with the help of Blockchain, organizations can go for a complete decentralized network where there is no need for a centralized authority, improving the transparency of the system.

Immutability– Blockchain is immutable, meaning nobody can modify the data over a blockchain. This feature enables companies to ensure that there is no hamper of data, making their system more functional in a highly competitive market. 

High Availability– As we already defined Blockchain as a decentralized system of peer to peer network, thus it is highly available due to the concept of decentralization. It offers decentralized services that provide unique access to the options that are otherwise unavailable.

Security– Unlike traditional databases, Blockchain provides a high level of security to its users. High security is due to the cryptographic algorithms which are being run behind the Blockchain. Rather than trusting any individual or third party, in the Blockchain, one needs to trust only cryptographic algorithms.

Fast Dealing- Traditional banking organization takes a lot of time in initiating and processing the transactions and is prone to human error and often requires a third-party intermediary. Blockchain can streamline and automate the entire process without any human intervention and with complete accuracy.

Reduced Transaction Fees- As Blockchain removes the involvement of the third party, it eliminates the overhead cost of exchanging the assets; thus, it leads to reduced transaction fees. 

18 Mention types of Consensus Algorithms?

  • Proof-of-Work (PoW)
  • Proof-of-Stake (PoS)
  • Delegated Proof-of-Stake (DPoS)
  • Proof-of-Authority (PoA)
  • Proof-of-Elapsed Time (PoET)
  • Byzantine Fault Tolerance

19 Explain how PoW consensus works.

The central principle behind PoW consensus is to solve complex mathematical problems and make the largest number of guesses as quickly as possible. Such requires a lot of computational power, and by using a more efficient mining machine to run calculations, a miner can maximize profitability in terms of crypto rewards. 

In this type of consensus mechanism, miners compete to be the first one to find a hash regarding a particular block, which can only be solved using sheer computing power to make the largest number of guesses. When a miner finds the right solution, they advertise it to the whole network, receiving a reward in cryptocurrency provided by the protocol. 

20 Explain the Concept of PoS

Proof-of-Stake is a consensus algorithm that deals with the main drawbacks of PoW. In this mechanism, every block gets validated before the network adds another block to the blockchain ledger. Unlike PoW, where miners have to solve complex puzzles, in PoS, miners can join the mining process using their coins to stake. It allows users to mine for rewards using very minimal hardware and software resources. Here, the mining capacity of a particular miner depends on how many coins they already have; thus, the more coins one has, the better chances are, which indicates only the richest can have control of the consensus. 

21 Define the term CBDC

CBDC stands for Central Bank Digital Currency, which is controlled directly by the country’s central bank and is backed by national credit and government power. 

In other words, CBDC is an electronic form of central bank money that can be used to store value and make digital payments seamlessly.

22 What is DeFi technology? Explain the term, DeFi Pulse 

Decentralized Finance can be defined as financial services using smart contracts that don’t need any central authority and uses decentralized, distributed ledger technology, Blockchain. Most of the DeFi protocols are based on the Ethereum Blockchain network. 

DeFi Pulse is a data site that lets individuals find the latest analytics and rankings of all DeFi protocols. Pulse rankings track the total value that is locked into the smart contracts of DeFi protocols so that individuals can stay up to date on the latest trends.

23 What is Hyperledger Fabric? 

Hyperledger Fabric is a distributed ledger platform that comes with versatility, modularity, and performance specially crafted to provide enterprise-grade solutions. It is an open-source enterprise-grade permissioned DLT platform known to provide modularity and versatility for a broad set of industry use cases, including banking, insurance, healthcare, supply chain, human resources, etc.

24 What are Smart Contracts? What are its benefits?

A smart contract is used to describe computer code that can facilitate the exchange of money, content, shares, or anything of value. When running on the Blockchain, smart contracts becomes like a self-operating computer program that executes automatically when desired conditions are met. Since such contracts run on the Blockchain, they run exactly as programmed, without any possibility of censorship, downtime, fraud, or any third-party interference. 

  • No intermediaries ensure a quick transaction process
  • Secure and Efficient
  • No Middleman, more savings 
  • Works with accuracy and precision 
  • Establish confidence
  • Automation saves time and effort. 

25 What are dApps? Mention some of the popular dApps.

Decentralized applications (dApps) are digital applications that exist and run on a peer to peer network of computers instead of a single computer. 

Some of the dApps that are popular, innovative, and feature-rich are:

  • Cipher
  • Chainlink 
  • EOS Dynasty
  • TraceDonate 
  • Brave  

26 Explain the role of Blockchain in Governance

Due to increased decentralization, data integrity, and transparency, along with better efficiency and reduced operational costs, blockchains are becoming popular in governance. From improving transparency to streamlining the tax collection mechanism, Blockchain distributed networks can help governments to operate more efficiently and build higher levels of trust among their citizens. 

27 Mention some of the myths related to Blockchain. 

  • Blockchain and Cryptocurrencies are the same. 
  • All blockchains are public blockchains.
  • Technology only targets the finance domain. 
  • Blockchain is just a database.
  • Blockchain is free and highly accessible. 

28 Are there any restrictions for putting records in Blockchain?

No, there is no such restriction. One can store any kind of record, depending upon their requirements. The most common type of records that are recorded in Blockchain are records of transaction processing, identity management, business transactions, health management data, and all other crucial documentation.

29 Is Blockchain a trusted approach?

Blockchain is undoubtedly a trustable technology that helps participating parties to share their valuable data in a secure and tamper-proof manner. It makes use of cryptography for securing crucial information, thus making it extremely hard for attackers to play with stored data. Due to its high potential to provide security, it is widely adopted and implemented by various organizations and businesses for their operations.

30 What do you know about the future of Blockchain?

Blockchain is likely to discover a whole new way of economic transactions and contribute to global economic development immensely. Although its mainstream adoption is yet to be achieved, once it is done, it will change the way businesses operate and transform the landscape of the technology sector forever.

Wrapping Up: How to Learn Blockchain?

We hope all the questions mentioned above will help you get ready for your interview.

If you are a beginner and want to get started with Blockchain, Blockchain Council can assist you. Whether you want to become a Blockchain Developer or an Expert, or an Architect, Blockchain Council can be your one-stop solution. Blockchain Council is a globally renowned organization with an authoritative group of subject experts and enthusiasts who are evangelizing Blockchain research and development, use cases and products and knowledge for a better world. 

All Blockchain certifications offered by Blockchain Council are meant for a duration of roughly 6-8 hours and to be completed as self-paced training. 

Getting certified will help you gain an in-depth understanding of Blockchain & its implementation and prove your Blockchain skills & understanding.

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

Prepare Yourself With These Top 30 Blockchain Interview Questions 2021

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Is Hyperledger Fabric a Right Candidate for 5G Use-Cases?

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Wondering how blockchain technology can transform 5G? What are the current challenges associated with this new generation cellular network? In this article, we will see how Hyperledger Fabric can provide a decentralized marketplace for fifth-generation, thus benefiting and enhancing its use-cases. 

Table of Contents 

  • ABC of Hyperledger Fabric 
  • What 5G promises? What are the Glitches?
  • Decentralized Marketplace with Hyperledger Fabric
  •  The Verdict

ABC of Hyperledger Fabric 

Hyperledger Fabric is a popular project under the Hyperledger umbrella, which has a private and permissioned network and whose modular architecture maximizes blockchain secrecy, flexibility and facilitates decision-making capabilities. The Fabric platform is permissioned and has a highly modular and configurable architecture, which enables a wide range of industry use cases, including finance, healthcare, human resources, among others. It is the first distributed ledger platform to promote the use of standard programming languages such as Java, Go, and Node.js.

Hyperledger Fabric is one of the most popular blockchain projects as it holds differentiating features such as privacy, confidentiality, modularity when compared to other popular blockchain models.

Due to the versatility, scalability, and security that it provides, Hyperledger online training has recently gained popularity. If you want to learn more about the Hyperledger family and become a Certified Hyperledger Expert, sign up to Blockchain Council. 

What 5G promises? What are the Glitches?

As telecom companies start functioning out the fifth generation of cellular networks, 5G is becoming ubiquitous. The 5G network promises innovative improvements compared to 4G and is expected to offer a variety of internet-based services, including vehicular communications and smart city infrastructure that require on-demand infrastructure and resource access to function efficiently. Given the sky-high expectations, there are few concerns to operate the new technology. To meet the sky-high expectations of the vertical industries using the 5G infrastructure, there are few concerns that 5G wireless cellular network has to deal with. Securing bandwidth to operate the new technology, establishing trust in applications with strong privacy requirements, supporting and adapting to sudden changes in demand for resources are the few significant concerns that need to be considered. As the world is getting crazy about 5G, excessive human traffic can cause network congestion, and low throughput can be the other issue.

Decentralized Marketplace with Hyperledger Fabric

Now, let’s explore how a decentralized marketplace built using private Blockchain and smart contracts can transform 5G. 

Basically, infrastructure network sharing requires two-sided agreements and is limited to long-term sharing of seldom active network resources. They can neither support on-demand short term sharing requests nor the broader markets. Since there is intense competition in the telecoms industry, and therefore a centralized marketplace is not going to be a viable solution. In a centralized marketplace, a trusted third-party is responsible who takes the final decision about allocating the resources and the price.

The idea of a decentralized marketplace built using a private blockchain and smart contracts can be advantageous to the telecom industry. The decentralized marketplace can be achieved by the Hyperledger Fabric market, where multiple players, including infrastructure providers, network operators, and other service providers, could participate in the decision-making capabilities like resource allocation and pricing process in a transparent and trustworthy way without involving any third-party intermediary. 

Hyperledger Fabric aims at developing a marketplace that does not rely on a central authority to determine the market.

Blockchain in 5G can transform privacy. This is because Blockchain uses cryptographic hash functions, which ensures that all the crucial information is encrypted and secured. Decentralized Blockchain makes use of asymmetric cryptography and various hash algorithms, which helps in protecting user identities. Technology enables multiple devices to be registered with their blockchain address; thus, there is no point of identity loss. 

The Verdict 

The implementation of Blockchain with 5G gives the world a new meaning. Although it is not solely responsible for its growth, it can be seen as a key enabler that plays a significant role in transforming the telecommunications industry. Fabric makes itself a one-stop solution for 5G use-cases with its high transaction throughput and low latency rate. But the fusion of both technologies can face several challenges. Many structural and technical aspects need to be addressed to reach the detailed 5G standards. There is a need to identify and discover specific regulatory mechanisms for the application of various agreements, such as smart contracts.

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

Is Hyperledger Fabric a Right Candidate for 5G Use-Cases?

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