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Blockchain Solution Architect
CBSA
BTA Certified Blockchain Solution Architect Questions and Answers

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Viewing page 6 out of 7 pages

Viewing questions 51-60 out of questions

Questions # 51:

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

Options:

Blockchain networks with low traffic

Permissioned blockchains

Blockchains that manage wealth and assets

Public blockchains

Answer

Questions # 52:

Your customer is an enterprise that is focused on financial sectors.

What type of blockchain would this customer likely want specified for their enterprise?

Options:

Permissionless

Decentralized

Hybrid

Permissioned

Answer

Explanation

Sometimes referred to as “private” blockchains, you are required to have some sort of permission to access any or parts of that blockchain. There are a multitude of variants and hybrid permissioned/permissionless blockchains that exist.

Questions # 53:

What component on the blockchain maintains the "world state"?

Options:

.acl

Reputation Manager

Distributed Ledger

.bna

Answer

Explanation

Distributed Ledger manages the world state and the transaction log in the blockchain. The world state is defined as the state of all transactions on the Blockchain, where all nodes agree that all blocks on the Blockchain are at the same state. It implements three key attributes. It efficiently calculates the cryptographic hash of the entire dataset of each block. It efficiently transmits a minimal “delta” changes to the dataset, when a peer is out of sync and needs to “catch up”. It minimizes the amount of stored data required for each peer to operate.

Questions # 54:

Message Calls in the Ethereum EVM is limited to a depth of ______?

Options:

128

256

1024

2048

Answer

Explanation

Calls are limited to a depth of 1024, which means that for more complex operations, loops should be preferred over recursive calls.

Questions # 55:

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?

Options:

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.

Answer

Explanation

If you really need a native currency for your chain network, you can develop your own native currency with chaincode. One common attribute of native currency is that some amount will get transacted (the chaincode defining that currency will get called) every time a transaction is processed on its chain.

Questions # 56:

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

Options:

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

Answer

Questions # 57:

In public key cryptography, the public key is used to:

Options:

Sign/approve any transaction/action that might be made by the holder of the key pair

Verify the digital signature of a given key pair

Decrypt the private key so valid transactions/actions can be performed

Encrypt the private key

Answer

Questions # 58:

What are two challenges with using a Proof of Work algorithm? (Select two.)

Options:

Mining pools not allowed

Difficulty rate goes done every year.

Expensive

Power Intensive

Answer

C, D

Questions # 59:

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

Options:

State Data, Transactional Data

State Data, Transaction logs

LevelIDb, CouchDB

Transaction Logs, CouchDB

Answer

Explanation

Fabric Ledger has two parts: • State data: Representation of current state of the assets. Asset state data can be changed upon changes to the state of the data. • Transaction Logs: Record of all the transactions (in the order they are received) which modified the state data, and once the data is written it is immutable and cannot be changed.

Questions # 60:

The word “Drapp” or “DApp” is most commonly understood to mean what?