Blockchain CBSA Exam Practice Test Instant Access

Question 1

Smart Contracts provide all the following benefits EXCEPT?

ALegally Enforcable

BAutonomy

CCast Savings

DEfficiency

EBackup

Answer : A

Smart contracts generally are not legal contracts. However, its possible that a smart contract could be accepted as a legal contract but not normally.

Question 2

__________ is a real-time gross settlement system (RTGS), currency exchange and remittance network by __________

ARipple, Ripple

BRipple, JP Morgan

CXRP, Ripple

DRipple, XRP

Answer : A

Ripple is a real-time gross settlement system (RTGS), currency exchange and remittance network by Ripple.

Question 3

If a Proof of Work blockchain such a s Bitcoin or Ethereum changed to a Proof of Stake consensus paradigm, which key component of the Proof of Work process would be eliminated?

AThere would be no need for the miners or nodes to perform a guessing game

BThe need to solve Byzantine Fault Tolerance

CAll fees related to transactions would be removed

DThe blockchain network would no longer have to display public transactions

Answer : A

Question 4

When considering tokens on the Ethereum Blockchain what is the main difference between ERC20 and ERC721 tokens?

ANo difference on Ethereum all tokens are fungible

BERC20 is not fungible while ERC721 tokens are fungible

CERC721 is not fungible while ERC20 tokens are fungible

DNo difference on Ethernet all tokens are not fungible

Answer : C

Non-fungible means unique. ERC is acronym of Ethereum Request for Comments. A standard allows for the implementation of a standard API for creating non-fungible tokens. To whom not familiar, ethereum, when launched during ICO, is using ERC-20 which ethereum coin can be broken down into smaller portion such as 0.000001. As you know, in coin, we don't differentiate it by serial number. Government only uses ''serial number'' to track the note and not on coin. Hence, there is no way to distinguish or trace your coin and my coin. This behavior is same in Ethereum coin. Startup has found a way to use ERC-721 to create a unique and traceable coin in ethereum blockchain technology. This is a break through in blockchain technology.

Question 5

Secure Hash Algorithm (SHA-256) output is always 256 bits or 32 bytes in length regardless of the length of the input (even if input is millions of bytes). Select best answer.

ANSA is spying on us so what's it matters.

BDepends on input

CFalse

DTrue

Answer : D

SHA stands for Secure Hash Algorithm. This is used to prove data integrity. The same input(s) will always produce the exact same output. This output is always 256 bits or 32 bytes in length regardless of the length of the input (even if input is millions of bytes).

Question 6

What are some advantages of Proof of Stake(POS) mining over Proof of Work(POW) mining? (Select three.)

AEnergy efficient in regards to that it could consume for electricity as compared to PoW

BFaster Hashing algorithms

CNo need for expensive compared to POW

DFaster validations compared to POW

EBetter blockchain security compared to POW

Answer : A, C, D

This eliminates the below challenges from PoW and believed to have an advantage.

No need of expensive hardware (a normal laptop or computer running the respective coin's Validator client will do as long as your laptop or computer is online)

Energy efficient as it won't consume high electricity as PoW does More loyal Validators As higher the stake the Validators have for a long time, more chances for the Validator to be picked up for ''forging'' and earn the transaction fee Faster validations

Question 7

What are two specific advantages of using Hyperledger Fabric? (Select two.)

ANo order service needed

BUse any programming language available

COpen Source Modular architecture

DAllows components to be plug-and-play

EMakes mining cryptos more efficient

Answer : C, D

Hyperledger is an open source collaborative effort created for open industrial blockchain development. It started in December 2015 by the Linux Foundation. Linux Foundation's objectives were to create an environment in which communities of software developers and companies meet and coordinate to build blockchain frameworks.

Blockchain CBSA BTA Certified Blockchain Solution Architect Exam Practice Test