Question 1

You are currently considering blockchain solutions for your organization. You read an article about 'blockless' blockchains.
What are the two benefits that could be gained over a traditional blockchain solution? (Select two.)

Options :

A : Faster Block writes

B : Greater Transaction Security

C : Faster Performance

D : Greater transaction Capacity

Answer: A,B

Question 2

What is another name for blockchains that run adjacent to the blockchains and also offer more scope for processing contracts?

Options :

A : Adchains

B : Funnelchains

C : Multichains

D : Sidechains

Answer: D

Question 3

What is the accepted best practice for preventing contract addresses from changing when a new contract is released?

Options :

A : Move your contract to a new blockchain

B : Delete the old contract and add the new version in its place

C : Addresses always change so use a calling contract

D : Use the ''- -addressForce'' parameter when releasing a new contract

Answer: D

Question 4

Consider the following scenario. A startup is building a chat app for smart phones where the messages sent between users are anonymous and get destroyed within 24 hours of being sent.

Which architecture would best solve the product need?

Options :

A : Ethereum for token management and chat messages; Mobile apps use JSON-RPC to communicate directly with Smart Contracts

B : Private blockchain to persist chat messages; Custom built token system with private blockchain smart contract

C : Token management for shareholders in a public blockchain; Mobile apps and data management built on existing multitier systems without use of blockchain

D : Hybrid blockchain for token management with Proof of Stake; private blockchain to persist the chat messages

Answer: C

Question 5

If a Proof of Work blockchain such a s Bitcoin or Ethereum changed to a Proof of Stake consensus paradigm, which key component of the Proof of Work process would be eliminated?

Options :

A : There would be no need for the miners or nodes to perform a guessing game

B : The need to solve Byzantine Fault Tolerance

C : All fees related to transactions would be removed

D : The blockchain network would no longer have to display public transactions

Answer: A

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