Blockchain CBSA Practice Test - Questions Answers, Page 8

Reference: https://dltlabs.com/how-difficulty-adjustment-algorithm-works-in-ethereum/

The advantages of DPoS are that it is scalable and provides fast transaction verification, but the disadvantage is that it partially centralized and the governance model has not been proven effective in a large project. DPoS is employed by Steemit, EOS, and BitShares.

Reference: https://hackernoon.com/an-overview-of-cryptocurrency-consensus-algorithms-9d744289378f

Withdraw funds rather than push funds to them automatically Favor pull over push for external calls as we've seen, external calls can fail for a number of reasons, including external errors. To minimize the damage caused by such failures, it is often better to isolate each external call into its own transaction that can be initiated by the recipient of the call. This is especially relevant for payments, where it is better to let users withdraw funds rather than push funds to them automatically. (This also reduces the chance of problems with the gas limit.)

Reference: https://github.com/ethereum/wiki/wiki/Safety#favor-pull-over-push-for-external-calls

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.

Reference: https://medium.com/@PatrickGohBS/ethereum-erc-721-vs-erc-20-4bff8c147fdf

Randao is based on Blockchain technology and provides the service of random number generation that is open source, decentralized, socialized and verifiably fair. Reference: http://randao.org/

Reference: https://www.nasdaq.com/article/what-is-an-ico-cm830484

Reference: https://www.nasdaq.com/article/what-is-an-ico-cm830484

The difference between these tokens and a standalone currency like Litecoin is that ERC20 tokens piggyback on the Ethereum network, hosted by Ethereum addresses and sent using Ethereum transactions.

Reference: https://support.exodus.io/article/108-what-is-an-erc20-token-and-does-exodus-support-it

Reference: https://developer.ibm.com/courses/all/blockchain-essentials/