Blockchain CBSA Exam Practice Test Instant Access

Question 1

A Blockchain network can be best categorized as:

AA centralized network

BA decentralized peer-to-peer network

CA series of nodes managed by a genesis node

DA distributed network centralized ledgers

Answer : B

Question 2

Adding more nodes to a blockchain network has which effect?

AIncreased centralization

BIncreased security

CDecreased costs

DIncreased performance

Answer : B

Question 3

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

ASerpant

BCobol

CLLL

DLLC

EVyper

FNode.js

GIOS

HMutan

ISolidity

Answer : A, C, H, I

Ethereum Smart Contracts run on compiled bytecode, which means that there can be several high-level languages which code can be written in. In particular, Ethereum has a number of languages available: 1. Solidity -- the most popular language now (2018). 2. Vyper -- A Language by Vitalik Buterin with an emphasis on security 3. LLL -- ''Low Level Lisp-like Language'' 4. Mutan -- Golang-like, deprecated in 2015 5. Serpent, Python-like, but seems to be no longer maintained 6. Bamboo

Question 4

Ethereum tries to keep the mining time difference between ____ and _____seconds.

A10, 18

B10, 20

C10, 29

D10, 19

Answer : D

Question 5

___________________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.

AEncryption

BConsensus

CValidation

DReplication

Answer : B

Consensus 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

Question 6

You currently using the Metamask Chrome plugin and you see a selection for Etherescan in the plugin.

What is Etherscan used for?

AA search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum Blockchain

BA search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Bitcoin Blockchain

CA search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum and Tokens Blockchain

DA search engine that allows users to easily lookup, confirm and validate transaction that have taken place on any Blockchain

Answer : A

A search engine that allows users to easily lookup, confirm and validate transactions that have taken place on the Ethereum Blockchain

Question 7

Which is the right order for Ethereum Denominations?

AFinney, Szabo, Mether, Wei

BGwei, Szabo, Finney, Ether

CFinney, Szabo, Mether, Gwei

DWei, Finney, Szabo, Ether, Tether

Answer : B

Most widely used are Wei, Gwei, Finney and Ether. With the tool https://etherconverter.online/ you can easily convert different units.

Blockchain BTA Certified Blockchain Solution Architect CBSA Exam Practice Test