On this pageExamQuestion 1Which year did Nick Szabo invent Smart Contracts?1986199620062016Question 2When was the Bitcoin White Paper released?October 31st, 2006October 31st, 2007October 31st, 2008October 31st, 2009Question 3Which year were the Ethereum Yellow Paper and the Tezos White Paper released?2013201420152016Question 4How many bitcoins will ever be issued (in millions)?12150150Question 5How many dollars were fundraised for The DAO (in millions)?12150150Question 6How many dollars were stolen from "The DAO Hack" (in millions)?12150150Question 7Which type of consensus is used in Bitcoin?Proof-of-ActivityProof-of-StakeProof-of-WorkProof-of-CapacityProof-of-BurnQuestion 8Which type of consensus was used at Ethereum's launch?Proof-of-ActivityProof-of-StakeProof-of-WorkProof-of-CapacityProof-of-BurnQuestion 9Which type of consensus is used in Tezos?Delegated Proof-of-StakeAbsolute Proof-of-StakeProof-of-StakeLiquid Proof-of-StakeQuestion 10A Bitcoin miner validates a block when:he finds a value lesser than the *Target*he finds a value greater than the *Target*Question 11On average, a new Bitcoin block is added every:1 minute10 minutes60 minutesQuestion 12Bitcoin's Difficulty is calculated every:2016 blocksday144 blocks2 weeksQuestion 13If two miners find a valid block, the situation is resolved with the next block to be mined creating:the longest chainthe chain with the most workQuestion 14At Bitcoin's launch, the reward for a block was:100 bitcoins50 bitcoins25 bitcoins10 bitcoinsQuestion 15The Bitcoin's "Halving" happens every:21,000,000 blocks21,000 blocks2,100 blocks210,000 blocks2,100,000 blocksQuestion 16In 2021, the block reward was:12.5 bitcoins10 bitcoins6.25 bitcoins5 bitcoins3.125 bitcoins2.5 bitcoins