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Blockchain BTA Certified Blockchain Solution Architect CBSA Exam Questions

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Question #1 (Topic: demo questions)

Which is the following is the metaphor that describes a logical dilemma that plagues many computer networks?

A.
 Neo Generals’ problem
B.
Byzantine Generals’ problem
C.
Byzantine Admirals’ problem
D.
Renaissance Generals’ problem
Correct Answer: B
Explanation:
BFT is so-named because it represents a solution to the "Byzantine generals' problem," a logical dilemma that researchers Leslie Lamport, Robert Shostak and Marshall Pease described in an academic paper published in 1982 
Question #2 (Topic: demo questions)

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

A.
Permissionless
B.
Decentralized
C.
Hybrid
D.
Permissioned 
Correct Answer: D
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. 
Question #3 (Topic: demo questions)

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

A.
Mining pools not allowed
B.
Difficulty rate goes done every year. 
C.
Expensive
D.
Power Intensive 
Correct Answer: C, D
Explanation not available for this question.
Question #4 (Topic: demo questions)

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

A.
 search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum Blockchain
B.
A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Bitcoin Blockchain
C.
A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum and Tokens Blockchain
D.
A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on any Blockchain 
Correct Answer: A
Explanation not available for this question.
Question #5 (Topic: demo questions)

A Byzantine failure is the loss of a system service due to a Byzantine fault requires . What is required?

A.
Consensus
B.
Crypthography
C.
Bandwidth
D.
Availability 
Correct Answer: A
Explanation not available for this question.
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