Blockchain 101

Front

What is a blockchain?

Back

A distributed and immutable ledger.

Front

What does a block in a blockchain contain?

Back

A list of transactions, a timestamp, and a hash

Front

What is the role of cryptography in blockchain?

Back

To ensure data privacy and secure transactions

Front

What is a key feature of blockchain that ensures security?

Back

Tamper-resistant ledger

Front

What is the consensus mechanism in blockchain?

Back

A process by which participants agree on the state of the ledger

Front

Which of the following is a popular consensus mechanism in blockchain? Options: Data Validation Protocol (DVP), Proof of Work (PoW), Transaction Evaluation System (TES), Hash Authorization Protocol (HAP)

Back

Proof of Work (PoW)

Front

What is a "smart contract"?

Back

A self-executing agreement with terms directly written into code

Front

What is the primary difference between public and private blockchains?

Back

Public blockchains are decentralized, and private blockchains are controlled by a specific entity.

Front

What is the role of miners in a blockchain?

Back

To secure the network and validate transactions by solving cryptographic puzzles

Front

What is the "hash" in blockchain technology?

Back

A unique identifier for a block based on its contents