Certified Blockchain Solution Architect CBSA Questions

dumps2022-03-10T02:18:02+08:00

Certified Blockchain Solution Architect CBSA questions are online. Studying Blockchain CBSA exam information is the first step for you to study the test. In real Blockchain CBSA exam, there are 70 questions, and you have 90 minutes to write the test. The required passing score of CBSA exam is 70%. The available language is English. Free Certified Blockchain Solution Architect CBSA exam questions are below.

Page 1 of 7

1. Proof of Stake consensus is most often needed for and implemented by:

Blockchain networks with low traffic

Permissioned blockchains

Blockchains that manage wealth and assets

Public blockchains

2. The merkle tree contains a full list of the transactions on the blockchain?

FALSE

TRUE

3. Select the best statement for determining how consensus is reached.

By the miner nodes which make sure that a transaction is valid.

By a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.

By every single node in the blockchain network different transactions.

By every single node in the blockchain network executing the same transaction.

4. What are some advantages of Proof of Stake (POS) mining over Proof of Work (POW) mining? (Select three.)

Energy efficient in regards to that it could consume for electricity as compared to PoW

Faster Hashing algorithms

No need for expensive compared to POW

Faster validations compared to POW

Better blockchain security compared to POW

5. Which factor influences the gas cost to deploy a Smart Contact on the Ethereum blockchain?

None. Smart Contract deployment has a fixed gas cost

The types of operations written in code within the Smart Contract

The current Ethereum market conditions

The total size of the complied Smart Contract measured in kilobytes

6. In Proof of Work group consensus, the “nonce” refers to?

The random data to be combined with the block data which will produce a hash output matching the current difficulty level

Random nonsense data inserted at the end of a block to fill it completely

The average Bitcoin price over the last 90 days

None of the above

7. By default, who can see transaction details on a public/open blockchain?

The initiator

Everyone

The recipient of a transaction

The network owner / administrator

8. The “Nothing-at-Stake” problem that could be realized by Proof of Stake networks would be caused by what?

If all of the validator nodes are taken offline

If validator nodes reject all transactions

Validator nodes approving all transactions on old and new software after a hard fork occurs

All of the above

9. Anonymity can be protected in blockchain applications by use of which of the following?

Centralized application hosting

End-to-end encryption

Cryptographic hashing

Blockchain-based data cubes

10. The Secure Registry Services enables Secured ____________Registry of base Hyperledger images and custom images containing chaincodes.

What type of registry is implemented?

Docker

EVM

Kubenetes

VMWare

Page 2 of 7

11. In Hyperledger, nodes need a ________________ to be able to communicate to the

network.

Valid Certificate

Valid License

Valid YAML file

Valid JSON file

12. A Byzantine failure is the loss of a system service due to a Byzantine fault in systems that requires________.

What is required?

Consensus

Crypthography

Bandwidth

Availability

13. 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 ______________.

Oracles

Wizards

Data rabbits

All of the above

14. In regards to understanding the Ethereum Virtual Machine what statement is true?

The EVM is extremely powerful, non-turing complete and perfect for doing computational intensive thins, because of the direct access to the graphics card.

The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.

While the EVM is Sandboxed, it isn’t as powerful as the Bitcoin network, because it’s not Turing Complete

The EVM can’t access hardware layers or anything outside a blockchain node because it’s sandboxed.

15. Composer Modeling Language is an object-oriented modeling language that defines the domain model for a business network definition. The modeling language is saved as a __________ file.

.json

.go

.txt

.ico

.cto

16. To approve pending ledger transactions, consensus algorithms often implement:

Byzantine Fault Tolerance

Access Control

Kerckhoffs’s Principle

Common Weakness Enumeration

17. Blockchain systems assume all parties are trusted by all other parties in the exchange or ecosystem.

FALSE

TRUE

18. Which types of data are able to be stored on any given blockchain ledger?

Each blockchain software specifies its own data storage rules

Any data that is within the UTC-8 standard

Unencrypted textual and numerical data

Encrypted textual and numerical data

19. Public blockchains can alter the blockchain ledger by:

Creating a hard fork of the blockchain data, tooling and/or software

Achieving community consensus via a Smart Contract to update the ledger

Re-hashing the blocks from the total block height down to the genesis block

Blockchain ledgers are immutable and can never be altered

20. Ideal bug reports link the bug being reported to a _______________

Business Value

Business Process

Regression Issue

Business Target

Progression Issue

Page 3 of 7

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

52%

74%

75%

51%

100%

22. What are two advantages of using a DPOS algo in a blockchain? (Select two.)

Scalable

Governance Model

Efficiency

Fast transactions

Centralized

23. What is a logic gate in electronics and computer science?

A logic gate usually takes in 2 inputs and gives out 1 output. The inputs and outputs are binary values, meaning they can be both 1 and 0.

A logic gate usually takes in 3 inputs and gives out 2 output. The inputs and outputs are binary values, meaning they can be 1 or 0.

A logic gate usually takes in 2 inputs and gives out 6 output. The inputs and outputs are binary values, meaning they can be both 1 and 0.

A logic gate usually takes in 2 inputs and gives out 1 output. The inputs and outputs are binary values, meaning they can be 1 or 0.

24. Which of the following cryptocurrencies use an alternate consensus method called "Scrypt" to BTC's Proof of Work (POW) SHA-256 algorithm?

Ripple

Peercoin

Litecoin

Steemit

25. In Ethereum the difficulty adjustment algorithm is coded in the ___________ file.

calcDifficultyFrontier

block_validator.go

calcDifficultyHomestead

calcDifficultyvalidator.go

26. 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.

FALSE

TRUE

27. You are currently consulting with an organization that ships widgets overseas. They would like to implement a Hyperledger Fabric and would like to know about how to use cryptocurrencies with Hyperledger Fabric.

What is the best answer?

If they need a native currency for their chain network, they can develop their own native currency with chaincode.

Hyperledger Fabric can be integrated with any crypto currency by using the proper APIs.

If they need a native currency for their chain network, they must use Ripple currency with chaincode.

If they need a native currency for their chain network, they must use Ethereum currency with chaincode.

Hyperledger Fabric does not support cryptocurrencies.

28. Ownership or partial ownership of an asset can be tracked with which type of token?

Equity

Utility

Ethereum

Game-based

29. You are considering a cryptocurrency and for your privacy and anonymity are number one priority.

Which cryptocurrency should you likely use?

Monero

Bitcoin

Dash

Shadowcoin

Litecoin

30. You are currently considering blockchain solutions for your organization. You read an article about "blockless" blockchains.

What are the two benefits that could be gained over a traditional blockchain solution? (Select two.)

Faster Block writes

Greater Transaction Security

Faster Performance

Greater transaction Capacity

Page 4 of 7

31. How are blocks of data “chained” together to ensure the integrity of transactions?

The hash of the previous block is written to the header of the current block

The ID of the previous block is stored in the current block

A public key is stored in each block for data decryption

The hash of the genesis block is kept in all block headers

32. Fabric Ledger has two specific parts. Select answer with the proper two parts.

State Data, Transactional Data

State Data, Transaction logs

LevelIDb, CouchDB

Transaction Logs, CouchDB

33. You are considering writing smart contracts and there are a few different languages you can consider. (Select two.)

Truffle

Serpent

Solidity

Embark

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

FALSE

TRUE

35. You currently on a conference call with an executive from a too big to fail bank. They are validating that they want to use Quorum or another enterprise blockchain. They specifically want to know what type of consensus algo it uses and what industry for the Quorum blockchain targets.

BFT, cross industry

POS, Financial only

Majority voting, Financial only

Majority voting, cross industry

POW, cross industry

36. The gas price is a value set by the creator of the blockchain transaction? (Select best answer.)

FALSE

Its Negotiable

TRUE

37. A private blockchain like Hyperledger would be the right choice for which scenario:

An enterprise that needs to build a scalable, secure, permissioned blockchain application

A network of family members who want to share passwords and other secure information with one another

Developers who want to rapidly prototype public blockchain solutions

A startup that desires to build a token and blockchain application for their users

All of the above

38. The two main types of transactions you can perform in Hyperledger Fabric are:

Chaincode Read and Chaincode Write transactions

Deploy and Invoke transactions

HFRead and HFAppend transactions

Call and Write transactions

39. What consensus algo uses a method of sending coins to an address where they cannot be retrieved?

Proof of Stake

Proof of Activity

Proof of Burn

Proof of Sending

40. One consideration that should be taken into account when building a product on a public blockchain is:

Blockchain fees associated with transactions that both the product and the user may have in order to use the product on that blockchain

What countries the blockchain is available in

How you can transfer your tokens to another blockchain if you decide to switch

How often the blockchain goes offline for maintenance

Page 5 of 7

41. Gas has multiple associated terms with it: Gas Prices, Gas Cost, Gas Limit, and Gas Fees. The principle behind Gas is to have a stable value for how much a transaction or computation costs on the Ethereum network.

Which is considered to be the static value for how much a computation costs in terms of Gas?

Price

Fee

Cost

Limit

42. Which of the following blockchain key components state how the transactions will be confirmed?

Distributed Ledger database

Validity Rules

Consensus Algorithm

Encryption

43. What type of "bug" generally occurs when something isn’t right according to business requirements?

Business logic

Business Requirements

Integration

Accessibility

Security

44. Looking the graph below, what type of an attack is this likely?

51% Attack

P+ Epsilon Attack

Blacklisting

Selfish Mining Attack

45. A ____________cipher basically means it is using a fixed key which replaces the message

with a pseudorandom string of characters.

It is basically the encryption of each letter one at a time.

What is the cipher type?

Stream

Block

Parallel

RSA

46. A product’s supply chain data is stored on blockchain. Only members of the product supply chain can write announcements to the blockchain but any consumer can query this data in a store to learn more about the product they want to buy. This is an example of a ____/____ blockchain.

public /closed

private / open

private / closed

public / open

47. Consider the following scenario: A large department store chain is being pressured by lawmakers to provide evidence that proves the store’s clothing is not produced through child labor. This is no easy task currently due to the store’s clothing being transferred between at least 6 different parties in between creation and placement at the storefront. The store chain is considering the use of blockchain to solve their problem. Discretion in the reading and writing of transactions is highly important to the store chain to protect its proprietary interests.

Which solution would best solve the product need?

Use a public blockchain that supports assets, then create a new clothing asset for each item created. When the clothing item is transferred to the next party in the process, require that the associated blockchain asset be transferred to the next party’s blockchain account with relevant metadata. The lawmakers can now view the transactions and transfers at any time.

Use a permissioned blockchain to build the technology. Require every party involved in the process to host a node on you network. Create a new clothing asset for each item created. When the clothing item is transferred to the next party in the process, have the previous party use your web portal to initialize a chaincode Smart Contract to transfer control of the asset. When the next party receives the asset have them use your web portal to initialize a chaincode Smart Contracts to acknowledge receipt of the asset. Provide read-only permissions to the lawmakers so they can receive the evidence they are looking for.

Both options are equally suitable

None of the above

48. Addresses on a blockchain are derived by a process of hashing _________.

Wallet Addresses

Private Keys

IP Addresses

Mac addresses

Public Keys

49. In the Bitcoin blockchain the "block creation time" is set to 10 minutes and this can never change.

FALSE

TRUE

50. Your company working for is now considering the blockchain. They would like to perform a POC with R3 Corda. The CIO was reading about different blockchain consensus algos and would like to understand what type of consensus algos is used with Corda.

What is the best answer?

R3 Corda is a pluggable blockchain and allows the enterprise flexibility

R3 Corda is a byzantine fault tolerant blokchain

R3 Corda is a proof of stake based blockchain

R3 Corda is a proof of work based blockchain

Page 6 of 7

51. How does a client app communicate with Hyperledger fabric chaincode (Smart Contracts)?

The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction

The app uses Hyperledger Composer to communicate with CouchDB which in turn invokes chaincode functionality

Client apps don’t communicate with Hyperledger fabric directly, they must use Hyperledger Composer for the transmission

The app points to a node’s IP address, then calls an invoke function on the chaincode address to start the write process

52. What are some likely repercussions that could occur as a result of a 51% attack to the Bitcoin network? (Select three.)

Unplanned Fork

Double Spending

Cancelling Transactions

Planned Fork

Selfless Mining

53. Proof of Stake based blockchain systems use what design to permit valid write transactions?

A genesis “Stake” node approves or disapproves transactions announced from other nodes

Validator nodes each give or pay a stake in order to write transactions, and if malicious, will lose their stake

Stakeholders or early product investors host nodes that approve or disapprove transactions from other nodes

Every node on the network holds an equal stake, and if malicious, gets flagged for removal

54. What are two cryptocurrencies that you would expect to see mining equipment with ASICS? (Select two.)

Bitcoin

Ethereum

Neo

Litecoin

Monero

55. ______ is the official Ethereum IDE that allows developers to build and deploy contracts

and decentralized applications on top of the Ethereum blockchain.

Mist

Mix

Truffle

Metamask

Embark

56. What is the difference in using Go-Ethereum over Ganache?

Can automate builds with Go Ethereum but you can’t with Ganache

Go Ethereum is written in Java whereas Ganache is written in Golang

Go Ethereum is real blockchain whereas Ganache is a blockchain simulation

Ganache is a real blockchain whereas Go Ethereum is a blockchain simulation

57. To interact with a deployed Ethereum Smart Contract, a user or app must:

Have a reference to the public address of the deployed Smart Contract

Have the appropriate permissions needed to invoke the functions of the Smart Contract

Have sufficient gas to perform read and write operations against the Smart Contract

All of the above

58. What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)

PoW imposes no limits on actions in the network and therefore can thwart attacks better than other algos due to high cost

What matters is to have large computational power to solve the puzzles and form new blocks over having a financial stake.

PoW imposes some limits on actions in the network and therefore can thwart attacks better than other algos due to high cost

The algo is energy efficient compared to POS and BFT

The algo is energy efficient compared to POS and DPOS

59. Bitcoin implemented Byzantine Fault Tolerance through a system named:

Authenticated Encryption

Proof of Work

PBKDF2

None of the above

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

Serpant

Cobol

LLL

LLC

Vyper

Node.js

IOS

Mutan

Solidity

Page 7 of 7

61. Which of the following is true concerning Hyperledger Composer?

It’s a competing blockchain to Hyperledger Fabric in the Hyperledger suite of tools

It’s an API layer that sits above Hyperledger Fabric and is required to interact with the Fabric blockchain

It’s a toolset and framework for easily developing business networks

It’s a consensus-focused replicable state machine framework for blockchain development

62. What benefit does HPE Cloud Cruiser provide?

Need for proven, production-ready technology

Need a full history of all application data

Require top-notch performance

Need to avoid data duplication or redundancy

63. The primary difference between a blockchain and blockless solution is?

Blockless solutions are slower

Blockless solutions are less reliable

Transactions are not verified by the entire network in a blockless environment

Blockless solutions do not work on mobile devices

64. What type of peer node executes transactions?

Monitoring

API Peer

Endorsing Peer

Ordering Peer

65. 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?

TRUE

FALSE

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

FALSE

TRUE

Certified Blockchain Solution Architect CBSA Questions

Certified Blockchain Solution Architect CBSA Questions

Share this post

Leave a Reply Cancel reply

Related Posts

Certified Blockchain Security Professional CBSP Exam Dumps