Block: A block consists of a header that includes information identifying

the block and linking it to the rest of the chain and a body of transactions.

Uncle block is associated with Ethereum-based blockchains, which are

valid and mined in a genuine manner but get rej ected from the main

blockchain due to the working mechanism of the blockchain.

Mining is the process of creating a block of transactions to be added to the

Ethereum blockchain.

Smart contracts are automatically executable programs, a software script

that describes the relationship of users.

dApp is an app where the “server-side” is j ust one or more well-known

smart contracts that exist on the Ethereum network.

Blockchain level protocols: A blockchain is a network of multiple devices

or nodes connected to each other through the Internet, a ledger that stores

the record of what has come in and gone out in a distributed p2p manner

after the transaction has been verified by all participating nodes.

Questions

1. What is Ethereum?

2. What are the features of Ethereum?

3 . How does the Ethereum virtual machine work?

4. What is Proof of Work?

5 . What is Proof of Stake?

6. What is Gas? Explain the issue of rising ETH gas fees which has led

to the rise of Layer 2 protocols such as a polygon.

7 . Compare Ethereum mining vs. bitcoin mining

8. What are Decentralized Applications (dApps)?

9 . What are Decentralized Autonomous Organizations (DAOs)?

10. Describe the real-world applications of Ethereum.