CBSA 시험 - Blockchain실제시험문제와 답 - 229문항

Question No : 1

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

A.Only through code executed in other Smart Contracts and XML-RPC
B.Through code executed in other Smart Contracts and through web3.js or any JSON-RPC library
C.Only through code executed in another Smart Contract
D.Smart Contracts cannot be externally invoked. They become autonomous at launch and cannot be called.

정답:

Question No : 2

Which of the following is not considered an Ethereum testnet?

A.Ropstein
B.Rinkeby
C.Mainnet
D.Kovan

정답:

Question No : 3

When you are developing with Fabric Composer which of the following is true?

A.Decreases the time of development
B.Simplifies the development of applications
C.Simplifies the integration of client applications
D.Increases the time of development

정답:
Explanation:
Hyperledger Composer is an open-source application development framework which simplifies the creation of Hyperledger Fabric blockchain applications, thus reducing the time and complexity of development. The tool aims at helping users to create blockchain applications based on Hyperledger Fabric without needing to know the low-level (Go Programming) details involved in blockchain networks.

Question No : 4

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

A.Ether
B.BTC
C.Monero
D.Litecoin

정답:
Explanation:
Ether Foundation of all ERC tokens “Smart Money”, money which can be programmed to make decisions for itself

Question No : 5

Miner takes each accepted transaction and writes it to the current block
C. Both of these ordering sequences can occur
D. None of the above

정답: A

Question No : 6

When considering tokens on the Ethereum Blockchain what is the main difference between ERC20 and ERC721 tokens?

A.No difference on Ethereum all tokens are fungible
B.ERC20 is not fungible while ERC721 tokens are fungible
C.ERC721 is not fungible while ERC20 tokens are fungible
D.No difference on Ethernet all tokens are not fungible

정답:
Explanation:
Non-fungible means unique. ERC is acronym of Ethereum Request for Comments. A standard allows for the implementation of a standard API for creating non-fungible tokens. To whom not familiar, ethereum, when launched during ICO, is using ERC-20 which ethereum coin can be broken down into smaller portion such as 0.000001. As you know, in coin, we don’t differentiate it by serial number. Government only uses “serial number” to track the note and not on coin. Hence, there is no way to distinguish or trace your coin and my coin. This behavior is same in Ethereum coin. Startup has found a way to use ERC-721 to create a unique and traceable coin in ethereum blockchain technology. This is a break through in blockchain technology.

Question No : 7

How many peers in the network need to endorse a transaction in a Hyperledger Fabric blockchain?

A.The number of peers required to endorse a transaction is driven by the IAM policy that is specified by the ledger.
B.The number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the DApps.
C.The number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the ledger.
D.The number of peers required to endorse a transaction is driven by the endorsement policy that is specified at chaincode deployment time.

정답:
Explanation:
The number of peers required to endorse a transaction is driven by the endorsement policy that is specified at chaincode deployment time.

Question No : 8

In what year did a whitepaper that was published by “Satoshi Nakamoto” outlined a solution to the Byzantine Generals problem?

A.2006
B.2009
C.2008
D.2010

정답:
Explanation:
In 2008 a whitepaper is published by “Satoshi Nakamoto” which outlines a solution to the Byzantine Generals problem

Question No : 9

Pending transactions on the Ethereum blockchain are always ordered by highest fee paid to lowest, and then written to the block in that order.

A.FALSE
B.TRUE

정답:

Question No : 10

A chaincode package that was signed at creation can be handed over to other owners for inspection and signing in Hyperledger.
Is it true that the workflow supports out-of-band signing of chaincode package?

A.TRUE
B.FALSE

정답:
Explanation:
A chaincode package that was signed at creation can be handed over to other owners for inspection and signing. The workflow supports out-of-band signing of chaincode package.

Question No : 11

What type of peer node executes transactions?

A.Monitoring
B.API Peer
C.Endorsing Peer
D.Ordering Peer

정답:
Explanation:
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 No : 12

The primary difference between a blockchain and blockless solution is?

A.Blockless solutions are slower
B.Blockless solutions are less reliable
C.Transactions are not verified by the entire network in a blockless environment
D.Blockless solutions do not work on mobile devices

정답:

Question No : 13

What benefit does HPE Cloud Cruiser provide?

A.Need for proven, production-ready technology
B.Need a full history of all application data
C.Require top-notch performance
D.Need to avoid data duplication or redundancy

정답:

Question No : 14

Which of the following is true concerning Hyperledger Composer?

A.It’s a competing blockchain to Hyperledger Fabric in the Hyperledger suite of tools
B.It’s an API layer that sits above Hyperledger Fabric and is required to interact with the Fabric blockchain
C.It’s a toolset and framework for easily developing business networks
D.It’s a consensus-focused replicable state machine framework for blockchain development

정답:

Question No : 15

Ethereum smart contracts can be written in what programming languages? Select all that apply.

A.Serpant
B.Cobol
C.LLL
D.LLC
E.Vyper
F.Node.js
G.IOS
H.Mutan
I.Solidity

정답:
Explanation:
Ethereum Smart Contracts run on compiled bytecode, which means that there can be several high-level languages which code can be written in. In particular, Ethereum has a number of languages available: 1. Solidity C the most popular language now (2018). 2. Vyper C A Language by Vitalik Buterin with an emphasis on security 3. LLL C “Low Level Lisp-like Language” 4. Mutan C Golang-like, deprecated in 2015 5. Serpent, Python-like, but seems to be no longer maintained 6. Bamboo

Blockchain CBSA 시험