What is a blockchain A decentralised machine that builds blocks and chains A digital ledger that keeps a permanent and secure records of transactions A type of cryptocurrency that allows chains to block requests I have no cooking clue. I didnt read the article.

Why are blockchains considered safe and secure? They all have antivirus and firewalls enabled Its protected by the National Internet Authorities Each transaction is validate by multiple computers No one knows where the blockchain is and cannot be downloaded.

Major uses of blockchain. It can provide a single source of truth It helps identify individuals and their daily movements There is no major use of blockchain. Its rubbish. There are multiple copies of the blockchain and therefore cannot be detroyed

Who was the first person to log a transaction on the Bitcoin blockchain? Elon Musk Santoshi Nakamoto Denzil Washington Yizodo Chiamanga Charles Hoskinson