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Important Questions for Blockchain Technology

This file contains a curated list of important questions for the Blockchain Technology exam, based on an analysis of previous year papers and assignments. The questions are organized unit-wise.

UNIT 1: Introduction to Blockchain

  1. What is Blockchain Technology? Explain its key components, characteristics, and applications.
  2. Cryptographic Primitives:
    • Explain the role of Elliptic Curve Cryptography (ECC) and ECDSA in blockchain security.
    • Describe how SHA-256 is used for hashing and ensuring data integrity.
    • Compare centralized, decentralized, and distributed P2P networks.
  3. Structure of a Blockchain:
    • Describe the structure of a block and a chain of blocks.
    • What is a genesis block?

UNIT 2: Consensus and Mining

  1. Consensus Algorithms:
    • What is a consensus protocol and why is it important in a decentralized system?
    • Explain the Byzantine General's Problem and how blockchain's consensus mechanisms solve it.
    • Compare and contrast Proof of Work (PoW) and Proof of Stake (PoS) in terms of their mechanism, energy efficiency, and security.
  2. Blockchain Mining:
    • What is blockchain mining? Explain its significance in securing the network and creating new blocks.
    • Explain the role of miners in a blockchain network.
    • What are mining pools?

UNIT 3: Bitcoin and Ethereum

  1. Bitcoin:
    • Explain the Bitcoin block format and the significance of the nonce.
    • Describe the difficulty adjustment algorithm in Bitcoin mining.
    • What is the Bitcoin halving event and its impact on the network?
    • Explain the concept of a 51% attack and double-spending attack.
  2. Ethereum:
    • How does Ethereum differ from Bitcoin? (Focus on smart contracts, ecosystem, and block format).
    • What is Solidity? Explain its role in developing smart contracts on Ethereum.

UNIT 4: Smart Contracts

  1. Introduction to Smart Contracts:
    • What is a smart contract? How does it differ from a traditional contract?
    • Explain the lifecycle of a smart contract (creation, deployment, execution).
  2. Applications of Smart Contracts:
    • Explain how decentralized ledgers can be implemented using smart contracts.
    • Discuss the use of smart contracts in escrow services, micropayments, and decentralized lotteries.
    • What are payment channels and how do they improve transaction efficiency?

UNIT 5: Hyperledger and Other Applications

  1. Hyperledger Fabric:
    • Explain the architecture of Hyperledger Fabric.
    • What is chaincode and what is its role in Hyperledger?
    • Describe the function of Membership Service Providers (MSPs) and private channels in a private blockchain network like Hyperledger.
  2. Blockchain in IoT and Cybersecurity:
    • How can blockchain technology enhance security in IoT devices and applications?
    • Discuss the role of blockchain in improving cybersecurity.
  3. Other Platforms:
    • Compare and contrast R3 Corda and Hyperledger.