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

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Viewing page 4 out of 7 pages

Viewing questions 31-40 out of questions

Questions # 31:

To prevent duplicate addresses/accounts from being generated on the same blockchain network, the input of the hash function that generates the address:

Options:

Should never be plain text

Should always be numerical

Should first be encrypted

Should contain enough entropy or randomness

Answer

Questions # 32:

Which of the following is NOT considered a token?

Options:

ICON

LTC

Golem

EOS

Answer

Explanation

LTC is Litecoin and is a crypto. Check Ethereum tokens here: https://etherscan.io/tokens

Questions # 33:

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

Options:

Ether

BTC

Monero

Litecoin

Answer

Explanation

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

Questions # 34:

Blockchain provenance is defined as _______________?

Options:

Information sent to the blockchain and written to the blockchain.

Recording the history of data, from its last block to various stages of the data lifecycle

Recording the history of data, from its inception to various stages of the data lifecycle.

Once a transaction has been written and committed to the ledger it cannot be changed.

Answer

Explanation

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.

Questions # 35:

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

Options:

Business logic

Business Requirements

Integration

Accessibility

Security

Answer

Explanation

Business logic – something isn’t right according to business requirements Security – the code is vulnerable to some security exploits Regression – some code updates caused existing features to break Performance – the code is slow or some actions execute extra functions

Questions # 36:

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

What is required?

Options:

Consensus

Crypthography

Bandwidth

Availability

Answer

Explanation

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

Questions # 37:

What is chaincode?

Options:

Smart contract

DApps

Node programs

Virtual machines

Answer

Questions # 38:

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

Options:

FALSE

Its Negotiable

TRUE

Answer

Explanation

The gas price is a value set by the creator of the transaction, who has to pay gas_price * gas up front from the sending account. If some gas is left after the execution, it is refunded in the same way. If the gas is used up at any point (i.e. it is negative), an out-of-gas exception is triggered, which reverts all modifications made to the state in the current call frame.

Questions # 39:

In Hyperledger Fabric, the smart contract logic is also called by two other names _______________ and ______________? (Select two.)