Cryptocurrencies, Blockchain

How do blockchains function like ledgers?

• They hold a record of all transactions that have ever occurred on a network.

• They hold vast amounts of transaction data as a centralized database.

• They periodically update all balances of each wallet to the blockchain.

Each block of a Blockchain consists of which of the following?

• A hash pointer to the previous block

• Timestamp

• List of transactions

• All of the above

What is cryptography?

• The study/science of maps

• The study/science of money

• The study/science of scrambling data into code

• The study/science of burial chambers

Why all participants/nodes in the peer-to-peer network need to validate the transaction?

• Due to its distributed structure and consensus-driven mechanism

• Due to its non distributed structure and lack of a consensus-driven mechanism

• None

What is a property specific to cryptographic hash functions?

• Input can be of any size

• Uses blockchain-based technology

• Collision resistance

• None of the above

Was the lecturer interesting and useful?

• Yes

• No

• Neutral

What is a blockchain?

• A centralized database that holds a subset of all transactions on all nodes.

• A client-server database existing on a limited number of nodes at the same time.

• A distributed database with a record of all transactions on the network.