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CBSA Exam Dumps - BTA Certified Blockchain Solution Architect

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Question # 25

Transactions can only be added to a blockchain.

A.

TRUE

B.

FALSE

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Question # 26

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.

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Question # 27

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

A.

Blockchain networks with low traffic

B.

Permissioned blockchains

C.

Blockchains that manage wealth and assets

D.

Public blockchains

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Question # 28

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

A.

If all of the validator nodes are taken offline

B.

If validator nodes reject all transactions

C.

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

D.

All of the above

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Question # 29

By design, permissioned blockchains such as Hyperledger Fabric are not capable of creating or utilizing cryptocurrency.

A.

FALSE

B.

TRUE

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Question # 30

What is provided by the Hyperledger Fabric to facilitate network communications?

A.

API

B.

SDK

C.

Ruby

D.

Middleware

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Question # 31

Which of the following would create a blockchain transaction?

A.

Updating a Smart Contract

B.

Updating an internal State variable

C.

Exchanging solution tokens

D.

All of the above

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Question # 32

___________is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization.

What algorithm is being referenced here?

A.

Byzantine Fault Tolerance

B.

Hashgraph

C.

Proof of Stake

D.

Proof of Work

E.

DAG

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