Question 1

Which of the following blockchain key components state how the transactions will be confirmed?

Accepted Answer

A)  Distributed Ledger database 
B)  Validity Rules 
C)  Consensus Algorithm 
D)  Encryption

Question 2

The difference between Ethereum tokens and a standalone currency like Litecoin is that ___________tokens piggyback on the Ethereum network, hosted by Ethereum addresses and sent using Ethereum transactions.

Accepted Answer

A)  ERC 
B)  ERC20 
C)  Ether 
D)  BIP

Question 3

Transactions can be only added to a blockchain.

Accepted Answer

A) True 
 B)False

Question 4

What does the acronym DAO represent?

Accepted Answer

A)  Distributed Autonomous Operations 
B)  Distributed Anonymous Organization 
C)  Distributed Anonymous Operations 
D)  Decentralized Autonomous Organization

Question 5

You are using Geth and you would like to list the accounts controlled by the node. What is the command?

Accepted Answer

A)  geth list accounts 
B)  geth account node list 
C)  geth account node 
D)  geth account list

Question 6

What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)

Accepted Answer

A)  PoW imposes no limits on actions in the network and therefore can thwart attacks better than other algos due to high cost 
B)  What matters is to have large computational power to solve the puzzles and form new blocks over having a financial stake. 
C)  PoW imposes some limits on actions in the network and therefore can thwart attacks better than other algos due to high cost 
D)  The algo is energy efficient compared to POS and BFT 
E)  The algo is energy efficient compared to POS and DPOS

Question 7

Which of these demonstrates the correct order of the lifecycle of a transaction on Ethereum blockchain?

Accepted Answer

A)  1. User uses Dapp/web3 to start transaction     2. User signs the transaction with their private key     3. Transaction validated on locally running node     4. Transaction broadcast to entire network     5. Miners choose to accept or pass on the transaction     6. Miner takes each accepted transaction and writes it to the current block 
B)      2. Transaction broadcast to entire network     3. If accepted by the network, user signs transaction with private key     4. Miners choose to accept or pass on the transaction     5. Miner takes each accepted transaction and writes it to the current block 
C)  Both of these ordering sequences can occur 
D)  None of the above

Question 8

In Hyperledger, nodes need a ________________ to be able to communicate to the network.

Accepted Answer

A)  Valid Certificate 
B)  Valid License 
C)  Valid YAML file 
D)  Valid JSON file

Question 9

Consider the following scenario: Due to consistent inaccuracies and outdated real estate listings, a residential real estate company wants to build a blockchain solution that accurately depicts which homes (assets) are available for purchase across all countries/provinces. All available homes should be publicly viewable by the general consumer audience, but certain details of the home, such as history of maintenance, should only be viewable by licensed real estate professionals. Which architecture would best solve the product need?

Accepted Answer

A)  Public data hosted on a public blockchain, Privileged data security hoisted on a private database 
B)  The entire solution built on a private blockchain with proper permissions for both public and privileged data 
C)  Public and privileged data on hybrid blockchain will Proof of Stake consensus 
D)  Public data hosted on a public blockchain; Privileged data hosted on a private blockchain

Question 10

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.

Accepted Answer

A)  notary 
B)  oracle 
C)  node 
D)  endpoint

Question 11

What is chaincode?

Accepted Answer

A)  Smart contract 
B)  DApps 
C)  Node programs 
D)  Virtual machines

Question 12

You currently on a conference call with an executive from a too big to fail bank. They are validating that they want to use Quorum or another enterprise blockchain. They specifically want to know what type of consensus algo it uses and what industry for the Quorum blockchain targets.

Accepted Answer

A)  BFT, cross industry 
B)  POS, Financial only 
C)  Majority voting, Financial only 
D)  Majority voting, cross industry 
E)  POW, cross industry

Question 13

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

Accepted Answer

A)  Blockchain networks with low traffic 
B)  Permissioned blockchains 
C)  Blockchains that manage wealth and assets 
D)  Public blockchains

Question 14

What are two specific advantages of using Hyperledger Fabric? (Select two.)

Accepted Answer

A)  No order service needed 
B)  Use any programming language available 
C)  Open Source Modular architecture 
D)  Allows components to be plug-and-play 
E)  Makes mining cryptos more efficient

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

When specifying blockchain technologies, it is important to understand its benefits and its challenges. What would be two challenges of blockchain technology adoption to an enterprise? (Select two.)

Accepted Answer

A)  Scalability, transaction speed / cost 
B)  Tokenization of platforms 
C)  Distributed 
D)  Very New Technology

Question 17

Taking a series of unrelated transactions and writing them to a particular block is:

Accepted Answer

A)  Highly insecure and considered bad practice 
B)  Most common in public blockchain 
C)  Most common in permissioned blockchains 
D)  Required among all blockchains

Question 18

Which of the following is NOT a requirement of an enterprise blockchain typically?

Accepted Answer

A)  Append-only distributed system of record shared across business network 
B)  Cost efficient blockchain 
C)  Transactions are endorsed by relevant participants 
D)  Ensuring appropriate visibility; transactions are secure, authenticated & verifiable

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A)  When the blockchain needs to be permissioned 
B)  When the aim of the blockchain is to be a trustless as possible 
C)  When the blockchain needs to support millions of transactions 
D)  All of the above

Exam 4: BTA Certified Blockchain Solution Architect

Which of the following blockchain key components state how the transactions will be confirmed?

The difference between Ethereum tokens and a standalone currency like Litecoin is that ___________tokens piggyback on the Ethereum network, hosted by Ethereum addresses and sent using Ethereum transactions.

Transactions can be only added to a blockchain.

What does the acronym DAO represent?

You are using Geth and you would like to list the accounts controlled by the node. What is the command?

What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)

Which of these demonstrates the correct order of the lifecycle of a transaction on Ethereum blockchain?

In Hyperledger, nodes need a ________________ to be able to communicate to the network.

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.

What is chaincode?

You currently on a conference call with an executive from a too big to fail bank. They are validating that they want to use Quorum or another enterprise blockchain. They specifically want to know what type of consensus algo it uses and what industry for the Quorum blockchain targets.

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

What are two specific advantages of using Hyperledger Fabric? (Select two.)

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

When specifying blockchain technologies, it is important to understand its benefits and its challenges. What would be two challenges of blockchain technology adoption to an enterprise? (Select two.)

Taking a series of unrelated transactions and writing them to a particular block is:

Which of the following is NOT a requirement of an enterprise blockchain typically?

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

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