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Blockchain CBSA BTA Certified Blockchain Solution Architect Exam Practice Test

Demo: 34 questions
Total 229 questions

BTA Certified Blockchain Solution Architect Questions and Answers

Question 1

Which of the following would NOT be true about what a smart contract gives your organization?

Options:

A.

Accuracy

B.

Savings

C.

Autonomy

D.

Trust

E.

Legal Assurance

Question 2

In Hashcash, miners all compete to look for a so called. "____________"which, if provided as input (together with other parts of a block header) to a hash function, yields an output that’s numerically small enough to claim the next block reward.

Options:

A.

Difficulty bits

B.

Nonce

C.

Merkle Root

D.

Timestamp

Question 3

By default, who can see transaction details on a public/open blockchain?

Options:

A.

The initiator

B.

Everyone

C.

The recipient of a transaction

D.

The network owner / administrator

Question 4

Which of the following hashing algos is considered to be the strongest?

Options:

A.

RSA

B.

SHA-2

C.

AES

D.

MD-5

E.

SHA

Question 5

Ethereum smart contracts can be written in what programming languages? Select all that apply.

Options:

A.

Serpant

B.

Cobol

C.

LLL

D.

LLC

E.

Vyper

F.

Node.js

G.

IOS

Question 6

In the Proof of Stake(POS) algorithm the miners are really known as ___________?

Options:

A.

Notary

B.

Oracle

C.

Forgers

D.

Minters

Question 7

Secure Hash Algorithm (SHA-256) output is always 256 bits or 32 bytes in length regardless of the length of the input (even if input is millions of bytes). Select best answer.

Options:

A.

NSA is spying on us so what’s it matters.

B.

Depends on input

C.

False

D.

True

Question 8

Gas has multiple associated terms with it: Gas Prices, Gas Cost, Gas Limit, and Gas Fees. The principle behind Gas is to have a stable value for how much a transaction or computation costs on the Ethereum network.

Which is considered to be the static value for how much a computation costs in terms of Gas?

Options:

A.

Price

B.

Fee

C.

Cost

D.

Limit

Question 9

What blockchain is considered Blockchain 1.0, the first blockchain?

Options:

A.

Bitcoin Cash

B.

Ethereum

C.

Litecoin

D.

Bitcoin

E.

NEO

Question 10

What are two cryptocurrencies that you would expect to see mining equipment with ASICS? (Select two.)

Options:

A.

Bitcoin

B.

Ethereum

C.

Neo

D.

Litecoin

E.

Monero

Question 11

Which is the right order for Ethereum Denominations?

Options:

A.

Finney, Szabo, Mether, Wei

B.

Gwei, Szabo, Finney, Ether

C.

Finney, Szabo, Mether, Gwei

D.

Wei, Finney, Szabo, Ether, Tether

Question 12

How does a client app communicate with Hyperledger fabric chaincode (Smart Contracts)?

Options:

A.

The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction

B.

The app uses Hyperledger Composer to communicate with CouchDB which in turn invokes chaincode functionality

C.

Client apps don’t communicate with Hyperledger fabric directly, they must use Hyperledger Composer for the transmission

D.

The app points to a node’s IP address, then calls an invoke function on the chaincode address to start the write process

Question 13

In its simplest form, user identity on a blockchain can be unique and secure:

Options:

A.

By users utilizing public blockchains

B.

User identity cannot yet be protected on blockchain systems

C.

Through cryptographic hashing

D.

By users utilizing permissioned blockchains

Question 14

Which of the following blockchain is NOT a permissioned blockchain?

Options:

A.

Quantum

B.

Ethereum

C.

R3 Corda

D.

Ripple

E.

Hyperledger

Question 15

In common blockchain design, identity and transaction approval is possible through:

Options:

A.

AES encryption

B.

Public key cryptography

C.

Secret key cryptography

D.

None of the above

Question 16

In blockchains there is the concept of "Group Consensus" and how many members must agree.

Options:

A.

52%

B.

74%

C.

75%

D.

51%

E.

100%

Question 17

To prevent duplicate addresses/accounts from being generated on the same blockchain network, the input of the hash function that generates the address:

Options:

A.

Should never be plain text

B.

Should always be numerical

C.

Should first be encrypted

D.

Should contain enough entropy or randomness

Question 18

Every node needs to keep track of time AND it needs to be in synch with its other peer nodes on the blockchain. In Bitcoin for example the current median for time is around?

Options:

A.

7 minutes

B.

7 seconds

C.

17 seconds

D.

70 Minutes

E.

70 Seconds

Question 19

The most popular Ethereum development framework is currently Truffle.

What are three features of Truffle? (Select three.)

Options:

A.

Scriptable deployment & migrations framework.

B.

Automated contract testing with Mocha and Chai.

C.

Takes Dapp transactions via Ws-rpc, json-rpc, ipc-rpc.

D.

Built-in smart contract compilation, linking, deployment and binary management.

E.

Automated contract testing with Mocha only

Question 20

In Hyperledger Fabric chaincode runs in a secured Docker container isolated from the endorsing peer process?

Options:

A.

TRUE

B.

FALSE

Question 21

What does the acronym DAO represent?

Options:

A.

Distributed Autonomous Operations

B.

Distributed Anonymous Organization

C.

Distributed Anonymous Operations

D.

Decentralized Autonomous Organization

Question 22

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

Options:

A.

FALSE

B.

TRUE

Question 23

Your customer is an enterprise that is focused on financial sectors.

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

Options:

A.

Permissionless

B.

Decentralized

C.

Hybrid

D.

Permissioned

Question 24

Which of the following is true concerning Hyperledger Composer?

Options:

A.

It’s a competing blockchain to Hyperledger Fabric in the Hyperledger suite of tools

B.

It’s an API layer that sits above Hyperledger Fabric and is required to interact with the Fabric blockchain

C.

It’s a toolset and framework for easily developing business networks

D.

It’s a consensus-focused replicable state machine framework for blockchain development

Question 25

Ethereum is considered to be a ______________type of blockchain.

Options:

A.

Permissionless

B.

Permission Based

C.

Hybrid

D.

Private

Question 26

Which of following scenarios and datasets would be best suited to be utilized by a blockchain solution?

Options:

A.

Scenario: Online game, Dataset: Unique Items In Game, Battles Won, Quests Completed

B.

Scenario: Mobile app for inspirational quotes; Dataset: First Name, Last Name, Quote of the Day

C.

Scenario: Sales (CRM) website; Dataset: Hot Lead Count, Lead Score, Lead Fullname, Today’s Tasks

D.

All of the above

Question 27

On the Ethereum blockchain the “nonce” of a transaction:

Options:

A.

Holds the gas amount to be paid to the miner writing the block that contains the transaction

B.

Is used to ensure that transactions by a given account are written in sequential order

C.

Is reset to zero after each successfully mined blocked

D.

Must always start with four zeroes

Question 28

Is it possible to access the blockchain via an Ethereum Node?

Options:

A.

Yes

B.

No

Question 29

Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.

What algo was the original solution to the potential problem as specified by Satoshi?

Options:

A.

Proof of Stake

B.

Byzantine Fault Tolerance

C.

Proof of Burn

D.

Proof of Work

E.

Dynamic Proof of Stake

Question 30

You would like to start your Gethin Fast Sync Mode.

What is the command for this?

Options:

A.

geth-mode—fast—cache 4096

B.

geth—fast—cache 4096

C.

geth—cache—fast 4096

D.

geth—fast-mode—cache 4096

Question 31

In Hyperledger Fabric, the smart contract logic is also called by two other names _______________ and ______________? (Select two.)

Options:

A.

CordApps

B.

DApps

C.

Programmatic Logic

D.

Ripple

E.

Chaincode

F.

Ledger

Question 32

Which of these desired outcomes is best obtained through a Blockchain solution?

Options:

A.

Pending financial transactions need to be stored until completed and then should be deleted

B.

A website that shows current data from various stock markets

C.

A mobile app that displays information about today’s weather

D.

None of the above

Question 33

Addresses on a blockchain are derived by a process of hashing _________.

Options:

A.

Wallet Addresses

B.

Private Keys

C.

IP Addresses

D.

Mac addresses

E.

Public Keys

Question 34

When a blockchain software is updated with new functionality that breaks or modifies the rules of the previous version of the software, what has just occurred?

Options:

A.

A hard fork

B.

Revision Reversal Attack

C.

A software fault

D.

Autonomous update consensus

Demo: 34 questions
Total 229 questions