BTA Certified Blockchain Solution Architect (CBSA) Free Practice Test

Question 1

An _____________ is a well-known service that signs transactions if they state a fact and that fact is considered to be true. They may optionally also provide the facts.

A. node

B. endpoint

C. oracle

D. notary

Correct Answer: C

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Question 2

Complex application components should try to be concentrated in which application layer?

A. None of the above

B. Interface layer / middle

C. Smart Contract / bottom

D. Presentation / top

Correct Answer: D

Question 3

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

A. FALSE

B. TRUE

Correct Answer: B

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Question 4

Which of the following scenarios and databases is least suited to be utilized by a blockchain solution?

A. Scenario: An Email campaign service; Dataset: Recipient Email, From Email; Subject, Body

B. Scenario: Law enforcement system; Dataset: Criminal Arrests, Warrants for Arrest, Conviction Date

C. Scenario: A family filter wifi router; Dataset: Websites Visited, Websites Blocked, Download History

D. Scenario: Credit score app; Dataset: Credit Score, Hard Inquiries; Collections, Date Removed, Date Added

Correct Answer: B

Question 5

Geth uses what port to expose the Ethereum RPC Service?

A. 8545

B. 2545

C. 4096

D. 2096

Correct Answer: A

Question 6

Ethereum currently uses the ___________Consensus Algo and in the future it is planned to go to the
__________Consensus Algo?

A. DPoS, PoW

B. PoW, PoS

C. PoS, PoW

D. PoW, DPoS

Correct Answer: B

Question 7

You currently using the Metamask Chrome plugin and you see a selection for Etherescan in the plugin.
What is Etherscan used for?

A. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum and Tokens Blockchain

B. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on any Blockchain

C. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Bitcoin Blockchain

D. A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum Blockchain

Correct Answer: D

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 8

Byzantine Fault Tolerance can be achieved only through Proof of Work.

A. FALSE

B. TRUE

Correct Answer: A

Question 9

What is chaincode?

A. Virtual machines

B. Smart contract

C. DApps

D. Node programs

Correct Answer: B

Question 10

___________________ensures that the shared ledgers are exact copies, and lowers the risk of fraudulent transactions, because tampering would have to occur across many places at exactly the same time.

A. Consensus

B. Encryption

C. Validation

D. Replication

Correct Answer: A

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 11

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

A. Distributed Application

B. Distributed Apps and Programs

C. Decentralized Application

D. Distributed Autonomous Application

Correct Answer: C

Question 12

Application Specific Integrated Circuit (ASIC) are used always in enterprise blockchains.

A. FALSE

B. TRUE

Correct Answer: A

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 13

Which scenario would it be most appropriate for a blockchain solution to implement a Proof of Work or Proof of Stake consensus?

A. When the blockchain needs to be permissioned

B. When the aim of the blockchain is to be a trustless as possible

C. All of the above

D. When the blockchain needs to support millions of transactions

Correct Answer: B

Question 14

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

A. FALSE

B. TRUE

Correct Answer: A

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Blockchain BTA Certified Blockchain Solution Architect (CBSA) Free Practice Test