Question 1

Hyperledger is an enterprise focused blockchain project. This project was released by a consortium under the umbrella of the Linux Foundation's Hyperledger Project. What year did Hyperledger go live?

Accepted Answer

Hyperledger was announced by the Linux Foundation in December 2015.

Question 2

If a product's requirements call for public autonomous on-chain code, only using open source code, using cryptographic tokens, and allowing its users the ability to earn tokens, this product should be launched on the Ethereum blockchain.

Accepted Answer

The answer of If a product's requirements call for public...

Question 3

There are two types of tokens in blockchain solutions. (Select two.)

Accepted Answer

The answer of There are two types of tokens in...

Question 4

All blockchain networks and systems require autonomous on-chain code in order to process transactions.

Accepted Answer

Blockchain networks and systems rely on smart contracts, which are autonomous on-chain code that executes transactions automatically based on predefined conditions.

Question 5

If a company desires to create a unique cryptocurrency and launch a new blockchain network to host it.

Accepted Answer

A company can create its own cryptocurrency and launch its own blockchain network using any common open source blockchain tool/system without being restricted to the ERC20 standard or Ethereum Virtual Machine.

Question 6

The "Nothing-at-Stake" problem that could be realized by Proof of Stake networks would be caused by what?

Accepted Answer

The answer of The "Nothing-at-Stake" problem that could be realized...

Question 7

Which cryptocurrency is also known as "Smart Money" in the blockchain world?

Accepted Answer

Ether Foundation of all ERC tokens "Smart Money", money which can be programmed to make decisions for itself

Question 8

Which of the following would create a blockchain transaction?

Accepted Answer

Exchanging solution tokens involves transferring assets on the blockchain, which creates a transaction. Updating a smart contract or an internal state variable does not necessarily create a blockchain transaction unless it involves a state change that is recorded on the blockchain.

Question 9

Hyperledger Composer has following two main components?

Accepted Answer

Hyperledger Composer has following main components: 1) Business Network Archive: Capturing the core data in a business network, including the business model, transaction logic, and access controls, the Business Network Archive packages these elements up and deploys them to a runtime. Business Network Archive files are stored as ".bna" files. 2) Composer Playground: This web-based tool allows developers to learn Hyperledger Composer, model out their business network (domain), test that network, and deploy that network to a live instance of a blockchain network. The playground keeps the development model in browser storage, allowing them to be easily uploaded or downloaded. The playground also allows for CRUD (create, read, update, delete) operations to be performed on asset transactions which are created and logged. Composer playground offers a repository of sample business networks that can provide a base for building your own business network

Question 10

In blockchains there is the concept of "Group Consensus" and how many members must agree.

Accepted Answer

In blockchain, a consensus mechanism often requires a majority, typically 51%, to agree on the validity of transactions or changes to the ledger. This is known as achieving "consensus."

Question 11

In what way(s) can Ethereum Smart Contract functions be invoked?

Accepted Answer

Ethereum Smart Contract functions can be invoked through code executed in other Smart Contracts and through web3.js or any JSON-RPC library, which allows interaction with the Ethereum blockchain.

Question 12

Blockchain provenance is defined as _______________?

Accepted Answer

Provenance means recording the history of data, from its inception to various stages of the data lifecycle. Provenance provides a detailed record of how the data was collected, where it was stored and how it is used. Blockchain holds complete provenance details of each component of data transfer. It is accessible to all the participants in a business network. It improves the system utilization and increases trust.

Question 13

Which of the following is true concerning Hyperledger Composer?

Accepted Answer

Hyperledger Composer is a toolset and framework designed to simplify the development of business networks on top of Hyperledger Fabric, not a competing blockchain or a consensus framework.

Question 14

A Smart Contract needs to check the daily closing price of a stock, in order to determine how to act. The proper way to do this is with the use of ______________.

Accepted Answer

Oracles are used in blockchain technology to fetch external data, such as stock prices, to be used in smart contracts.

Question 15

What type of peer node executes transactions?

Accepted Answer

Endorsing Peers (Endorsers) An endorser executes and endorses transactions. The endorsing peers take the role of endorsing transactions before they are ordered and committed as per the policy defined in Chaincode.

Question 16

The difference between a decentralized and a distributed system is?

Accepted Answer

A decentralized system is characterized by the lack of a single controlling entity, allowing multiple independent parties to participate, whereas a distributed system refers to the architecture where components are located on different networked computers.

Question 17

Which of following scenarios and datasets would be best suited to be utilized by a blockchain solution?

Accepted Answer

Blockchain is well-suited for scenarios requiring secure, transparent, and tamper-proof records, such as tracking unique items in an online game.

Question 18

Without 100% autonomy, blockchain software and networks would serve little purpose.

Accepted Answer

Blockchain can still serve significant purposes without 100% autonomy, such as enhancing transparency, security, and efficiency in various applications like supply chain management and financial transactions.

Question 19

Blockchains only work to store financial transactions or other exchanges of monetary value.

Accepted Answer

Blockchains can store a wide range of data types beyond financial transactions, including supply chain information, digital identities, and smart contracts.

Question 20

Which of these demonstrates the correct order of the lifecycle of a transaction on Ethereum blockchain?

Accepted Answer

The correct order of the lifecycle of a transaction on Ethereum blockchain is:1. User uses Dapp/web3 to start transaction2. User signs the transaction with their private key3. Transaction validated on locally running node4. Transaction broadcast to entire network5. Miners choose to accept or pass on the transaction6. Miner takes each accepted transaction and writes it to the current block

Exam 4: BTA Certified Blockchain Solution Architect