Blockchain CBSA Exam Practice Test Instant Access

Question 1

If a hard fork occurs on a public blockchain software and 20 running nodes choose not to update, what can be said about those 20 nodes?

AThey are effectually now operating on a different blockchain network than the nodes that updated

BThey are considered ''out of compliance''

CThey are flagged for removal from the network and can no longer collect fees

DThey are unable to achieve consensus

Answer : A

Question 2

Which one of the following is true regarding Smart Contracts on the Ethereum blockchain?

AThey provide added security over off-chain transaction code on other blockchain networks

BBecause they are compiled into bytecode they cannot be used in an unintended manner

CAny flaw discovered in their code can quickly be updated and redeployed

DThey are Turing complete and deterministic in nature

Answer : D

Question 3

In public key cryptography, the public key is used to:

ASign/approve any transaction/action that might be made by the holder of the key pair

BVerify the digital signature of a given key pair

CDecrypt the private key so valid transactions/actions can be performed

DEncrypt the private key

Answer : D

Question 4

How are blocks of data ''chained'' together to ensure the integrity of transactions?

AThe hash of the previous block is written to the header of the current block

BThe ID of the previous block is stored in the current block

CA public key is stored in each block for data decryption

DThe hash of the genesis block is kept in all block headers

Answer : A

Question 5

A Smart Contract is most like which classical programming object?

AClass

BVariable

CMethod

DFunction

Answer : D

Question 6

Transactions can be only added to a blockchain.

AFALSE

BTRUE

Answer : A

Question 7

Which one of the following is a consideration that must be taken into account when using Hyperledger Fabric that you wouldn't need worry about on Ethereum?

AThe fees for deploying and using Smart Contracts

BHow you will provide proper uptime for the network

CThe level of security of Smart Contracts (chaincode)

DHow often hard forks occurs on the software

Answer : D

Blockchain BTA Certified Blockchain Solution Architect Exam Practice Test