Exam 4: BTA Certified Blockchain Solution Architect

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?

___________is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization. What algorithm is being referenced here?

R3 Corda does not organize time into blocks. What does Corda actually perform and use?

A private blockchain like Hyperledger would be the right choice for which scenario:

When developing in Ethereum which is considered to be an In-Memory Blockchain simulations for rapid development?

___________________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.

The primary difference between a blockchain and blockless solution is?

The Hyperledger Fabric business network is divided into three categories. What are the three categories? (Select three.)

Which factor influences the gas cost to deploy a Smart Contact on the Ethereum blockchain?

Without 100% autonomy, blockchain software and networks would serve little purpose.

What are two advantages of using a DPOS algo in a blockchain? (Select two.)

On the Ethereum blockchain the "nonce" of a transaction:

The CA (Fabric CA by default) issues a ______________ to each member (organization or individual) that is authorized to join the network.

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?

You have flown to NYC to have a discussion with a technical executive of a too big to fail bank. You are having a discussion about blockchain algos and the customer is asking what are some disadvantages of using a POW algo?

Consider the following scenario: A large department store chain is being pressured by lawmakers to provide evidence that proves the store's clothing is not produced through child labor. This is no easy task currently due to the store's clothing being transferred between at least 6 different parties in between creation and placement at the storefront. The store chain is considering the use of blockchain to solve their problem. Discretion in the reading and writing of transactions is highly important to the store chain to protect its proprietary interests. Which solution would best solve the product need?

The difference between a decentralized and a distributed system is?

Which of these is the name of a well known open source peer-to-peer hypermedia distributes file system?

Which of the following is true concerning Hyperledger Composer?

Which types of data are able to be stored on any given blockchain ledger?