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

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 3

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

ABy users utilizing public blockchains

BUser identity cannot yet be protected on blockchain systems

CThrough cryptographic hashing

DBy users utilizing permissioned blockchains

Answer : C

Question 4

To approve pending ledger transactions, consensus algorithms often implement:

AByzantine Fault Tolerance

BAccess Control

CKerckhoffs's Principle

DCommon Weakness Enumeration

Answer : A

Question 5

Byzantine Fault Tolerance can be achieved only through a Proof of Work.

AFALSE

BTRUE

Answer : A

Question 6

In what way(s) can Ethereum Smart Contract functions be invoked?

AOnly through code executed in other Smart Contracts and XML-RPC

BThrough code executed in other Smart Contracts and through web3.js or any JSON-RPC library

COnly through code executed in another Smart Contract

DSmart Contracts cannot be externally invoked. They become autonomous at launch and cannot be called.

Answer : B

Question 7

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

AThe initiator

BEveryone

CThe recipient of a transaction

DThe network owner / administrator

Answer : B

Blockchain CBSA BTA Certified Blockchain Solution Architect Exam Practice Test