Chapter 1 Introduction to Blockchain

 - Who published a white paper proposing Ethereum in 2013?

Ethereum was proposed by Vitalik Buterin. He published the white paper in late 2013.

-What happens if someone loses the private key of his wallet?

 -Who owns the Blockchain?

Answer: No single entity owns the entire blockchain. Blockchains are decentralized and distributed ledgers that operate on a network of computers (nodes). Ownership of the blockchain is distributed across all participants (nodes) in the network. Each node has a copy of the entire blockchain, and they work together to reach consensus on the validity of transactions and the state of the ledger.

 -What is Public & Private blockchain?

 --What is stream cipher and block cipher?

- Write a short note on crypto wallet.

 -What are the tasks of miners?

 -Which are the components of blockchain?

- What are the layers of blockchain?

 -Define transaction and explain its structure.

-What is the difference between public and private blockchains?

-Blockichains are slow as comgure in database. Imanfy.

-Write a short note on challenges of blockchain

 -Write a short note on first Generation Blockchain.