QUIZ: What is blockchain? (opening chapter)
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Blockchain is a , distributed database. (centralized/decentralized)
The nature of blockchain technology is often described as a “ ledger”. (analog/digital)
The blockchain’s potential is very . (limited/great)
Blockchain relies on a network of computers, called . (nodes/robots)
Each block contains a unique code, called a . (hash/cheat sheet)
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