Bitcoin quiz

In which year the Bitcoin whitepaper was published?

• 2002

• 2009

• 2008

• 2007

In 2010 the first commercial transaction with Bitcoin was made by Laszlo Hanyecz. How many bitcoins he paid for two pizzas?

• 2400

• 10

• 15000

• 10000

In which year bitcoin reached parity with the US dollar for the first time?

• 2011

• 2015

• 2010

• 2014

Approximately what year the last bitcoin will be mined?

• 2601

• 2140

• never

• 2048

What the smallest unit in the Bitcoin system is called?

• szabo

• nakamoto

• satoshi

• finley

What is a private key?

• Password to your wallet

• Same as the public key

• A string of letters and numbers, which is used to sign transactions that spend bitcoins in your wallet

• A synonym for address

How many confirmations is considered safe for a Bitcoin transaction?

• 6

• 3

• 2

• 12

What purpose do miners serve?

• They control how many new bitcoins are issued every 10 minutes

• They create new Bitcoins

• They have no purpose and are not really needed

• They collectively synchronize on a single history of transactions

How fast each new Bitcoin block is created?

• Exactly every 10 minutes

• On average, every 10 minutes

• On average every 5 minutes

• Exactly every 5 minutes

How many bitcoins is the reward for creating a block currently?

• 6.25

• 12.5

• 50

• 25