Exin BLOCKCHAINF Exam Questions Instant Access

Question 1

If a node on the network were to lose a copy of the ledger, the ledger is not lost. The large number of other nodes have a copy and won't lose track. This is known as___________.

ACensorship

BImmutability

CTransparency

DRedundancy

Answer : B

Question 2

One of Blockchain's primary uses of cryptography is___________.

Akeeping the network configuration a secret

Bproviding a public and private encryption key

Callowing users to communicate with each other anonymously

Dkeeping the I.P. addresses a secret

Answer : B

Question 3

Which Blockchain protocol uses Proof of Work Consensus? Select all that apply

AHyperledger

BCorda

CBitcoin

DEthereum

EAll of the above

Answer : A, C, D

Question 4

What are the drawbacks of using Blockchain? Select all that apply

AHigh cost of developers

BChanging technology and the lack of a stable standard

CIts use of cryptography

DIts use of new applications

Answer : B

Question 5

A Blockchain does NOT provide which attribute?

ASecurity through distribution

BAnonymity through cryptography

CFault Tolerance through distribution

DImmutability through hashing

Answer : B

Question 6

In a private business Blockchain, transactions are endorsed by______________.

Aonly relevant business participants

Bonly the smart contract developer

Call the nodes on the Blockchain

Dall participants with access to the network

Answer : A

Question 7

What happens if a block is confirmed at the same time?

AThe blocks splits into two chains. Blocks are then added to each chain until one chain becomes larger. The longest chain is then considered to be the Blockchain.

BNodes select which block to be added to the Blockchain

CBoth chains are deleted, and the unconfirmed transactions are added back to the pool

DThe Orderer Block confirms which block has the most confirmed transactions

ENone of the above

Answer : B

Exin Blockchain Foundation BLOCKCHAINF Exam Questions