Exin BLOCKCHAINF Exam Practice Test Instant Access

Question 1

What is a Blockchain?

AA digital currency

BAn unchangeable record

CA database of usable secret data

DA Smart Contract

EAll of the above

Answer : B

Question 2

Which type of data can be stored on a Blockchain?

AA financial transaction

BA vote cast in an election

CA personal medical record

DRomeo and Juliet: The entire play

EAll of the above

Answer : E

Question 3

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 4

A Blockchain is a/an _____________ shared ledger distributed system.

AAnonymous

BNewer version of a

CAppend-only

DConfidential

Answer : A

Question 5

How much data can be represented by the data hash of a block?

Aa maximum of 20 MB

Bvirtually any amount

Cnot to exceed 100k bytes

Dthe hash is only a memory location

Answer : B

Question 6

Once a record is stored on the Blockchain ____________.

Athe record is moved to a secure server

Bthe record is stored on a central node

Cit can be changed by an authorized person

Dthe record is permanent
Reference can be changed by an authorized person

Answer : D

Question 7

What do consensus methods achieve?

AAnonymity in a peer to peer network

BThe highest level of security in a database by ensuring 51% agreement of nodes on the network.

CThe most efficient way of recording a transaction in any database.

DIt confirms that all nodes on the network are legitimate.

ENone of the above

Answer : D

Exin Blockchain Foundation BLOCKCHAINF Exam Practice Test