A blockchain is a growing list of records, called blocks, that are linked together using
1. a) cryptography
b) cryptogarphy
c) crypotography.
Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree). The timestamp proves that the transaction data existed when the block was published in order to get into its hash. As blocks each contain information about the block previous to it, they form a chain, with each additional block
2. a) reinforceing
b) reinforsing
c) reinforcing
the ones before it. Therefore, blockchains are
3. a) resistent
b) resistant
c) resistiant
to modification of their data because once recorded, the data in any given block cannot be altered
4. a) retractively
b) retroactively
c) retrocatively
without altering all subsequent blocks.
Blockchains are typically managed by a peer-to-peer network for use as a publicly distributed ledger, where nodes collectively adhere to a
5. a) protocol
b) protacol
c) protecol
to communicate and
6. a) valedate
b) valadate
c) validate
new blocks. Although blockchain records are not unalterable as forks are possible, blockchains may be considered secure by design and
7. a) exempilfy
b) exemplify
c) exemplifly
a distributed computing system with high Byzantine fault
8. a) tolerance
b) tolerince
c) tolerence.
The blockchain was invented by a person (or group of people) using the name Satoshi Nakamoto in 2008 to serve as the public transaction ledger of the
9. a) cryptocurriency
b) cryptocurrencey
c) cryptocurrency
"bitcoin". The identity of Satoshi Nakamoto remains unknown to date. The invention of the blockchain for bitcoin made it the first digital currency to solve the double-spending problem without the need of a trusted
10. a) authority
b) authoriaty
c) authourity
or central server.
