D334 - Chapter 10 Knowledge Check

Regarding key generation involved with Bitcoin transactions, (1) what size is the private key that is initially generated, and (2) what size is the Elliptic Curve public key that is generated? (1) 256-bit private key, (2) 512-bit Elliptic Curve public key (1) 128-bit private key, (2) 128-bit Elliptic Curve public key (1) 128-bit private key, (2) 256-bit Elliptic Curve public key (1) 512-bit private key, (2) 256-bit Elliptic Curve public key

(1) 256-bit private key, (2) 512-bit Elliptic Curve public key

A blockchain mining process where a new block of transactions is added to the blockchain and transactions within the block are considered to be processed occurs about every___ minutes. 30 10 24 60

10

What is the hash value, in bits, produced by the Keccak algorithm used in Ethereum gas calculations? 512 128 256 1024

256

In Bitcoin transactions, a 256-bit random key is converted into a Wif with an address that is in Base-58 format. Where is the WiF stored? Bitcoin wallet Bitcoin Exchange Registry (BER) Bitcoin Vault Bitcoin Transfer Registry (BTR)

Bitcoin wallet

What term below best describes a ledger/database of trustworthy transactions used by Bitcoin that aids in preventing individuals from spending crypto-currency that they do not have? Gas Ethereum Blockchain BTC

Blockchain

From the list below, select the items the gas price per transaction in Ethereum directly influences. Select all that apply. DoS prevention Spanning tree Code designer efficiency Infinite loop prevention

DoS prevention Code designer efficiency Infinite loop prevention

Regarding crypto currency, BTC is to Bitcoin as _____ is to Ethereum. Ether ETT geth Gas

Ether

The main contribution of _______ is to create the concept of peer-to-peer smart contracts which enables users to create their own contracts, and which will be strictly abided to. Bitcoin Cryptkash Solidity Ethereum

Ethereum

Each time a Bitcoin miner processes a transaction, the reward increases which in turn ensures the supply of coins increases over time. True False

False

In effort to maintain transparency, all blockchain implementations are public. False True

False

Use of a centralized server with Bitcoin facilitates ease of management of transactions. True False

False

What describes the unit that is used to measure the amount of work that is required to perform a single Keccak-256 hash when dealing with Ethereum? Gas Bytes Work Factor Ether

Gas

In comparing public and private blockchain implementations, which offers the best level of trust and security? Private Public

Public

Bitcoins generate a 256-bit random key which is converted into a ______ key, and which has a 256-bit private key and a 512-bit public key. shared TOR Wif Pseudo-random

Wif

The high reward that comes with successful crypto mining makes it highly competitive. What aspect makes the process challenging and limits those in contention. lab space required computing power required math calculations required insider trading knowledge required

computing power required

The major difference between Hyperledger and Ethereum is that Hyperledger does not offer the smart contracts feature. False True

false

Bitcoin miners with the ______ resources have the best chances of successfully mining transactions to gain rewards. newest quietest stealthiest fastest

fastest

With regard to Bitcoins, the ______ refers to the first transaction created. crypto currency genesis record Blockchain crypto currency source

genesis record

______ is a command line interface for running Ethereum node implemented in Go Language. Using the interface allows you to join Ethereum networks, transfer ether between accounts or even mine ethers. Ether Gas geth Splunk

geth

What aspect of a given Ethereum transaction may detract a crypto currency miner from pursuing it? low fee gas creep high fee ether creep

low fee

A bitcoin transaction in simplest terms consists of an owner of bitcoin transferring ownership to another party. Valid transactions are captured by ______ who will hash, compile, and eventually integrate the mined block into a blockchain network if legit. bankers hackers miners ADMINs

miners

A mining node that successfully completes the creation of a current Blockchain is __________. a class 1 felon deducted bitcoins rewarded with bitcoins violating privacy

rewarded with bitcoins

Bitcoin leverages ECC to ____ transactions. Store sign for prevent monitor

sign for

Ethereum was created by Vitalik Buterinin in 2015 and was built on the Bitcoin/Blockchain concept but included which additional concept? transactions crypto currency smart contracts Cryptography

smart contracts

Bitcoin currency is created when users mine for it, using computers to perform complex calculations through special software. False True

true