- What is blockchain technology, and how does it work?
- Explain the differences between a public, private, and consortium blockchain.
- What is the purpose of a consensus mechanism in blockchain?
- Describe the difference between Proof of Work (PoW) and Proof of Stake (PoS).
- What is a smart contract, and how does it function?
- How does a blockchain achieve immutability?
- What are the advantages of decentralization in blockchain?
- What is a gas fee, and why is it important in blockchain networks?
- Explain the concept of hashing in blockchain.
- What is the difference between a block and a transaction in a blockchain?
- What is the Ethereum Virtual Machine (EVM)?
- Explain the difference between ERC-20 and ERC-721 tokens.
- How do you deploy a smart contract on Ethereum?
- What tools do you use for Ethereum development?
- How does Solidity handle inheritance in smart contracts?
- What is the purpose of the 'fallback' and 'receive' functions in Solidity?
- What are events in Solidity, and how are they used?
- How do you debug or test a smart contract?
- What is Remix IDE, and how is it used for blockchain development?
- How do Ethereum wallets store private keys securely?
- What makes Solana different from Ethereum?
- What is the Solana runtime, and how does it work?
- Explain how Proof of History (PoH) operates in Solana.
- What is Solana Web3.js, and how do you use it?
- How do you create and manage Solana accounts programmatically?
- What is Anchor, and how does it simplify smart contract development on Solana?
- How do you request an airdrop in the Solana devnet?
- Explain the role of Solana validators in maintaining the network.
- How do you fetch transaction history for a Solana wallet?
- What is the purpose of Solana clusters like devnet, testnet, and mainnet?
- What are some commonly used blockchain development tools and frameworks?
- How do you set up a development environment for blockchain projects?
- What is Truffle, and how is it used in blockchain development?
- How do you manage dependencies in a blockchain project?
- What is Hardhat, and how is it different from Truffle?
- How do you integrate a frontend application with a blockchain backend?
- What is Web3.js, and how do you use it?
- What are the differences between Web3.js and ethers.js?
- How do you test blockchain applications locally?
- What is Ganache, and why is it used?
- What are common security vulnerabilities in smart contracts?
- Explain reentrancy attacks and how to prevent them.
- What is the importance of auditing smart contracts?
- How do you ensure private keys are securely stored?
- What is front-running, and how can it be mitigated?
- What are the best practices for writing secure smart contracts?
- What is the role of cryptography in blockchain security?
- What is MEV (Miner Extractable Value), and why does it matter?
- How do you handle gas optimization in smart contracts?
- What are tools for analyzing and auditing smart contracts?
- What are Layer-1 and Layer-2 solutions? Provide examples.
- What is sharding, and how does it improve blockchain scalability?
- Explain the concept of zero-knowledge proofs.
- What are Rollups, and how do they work?
- What is the InterPlanetary File System (IPFS), and how is it used in blockchain?
- Explain the difference between fungible and non-fungible tokens.
- What is a DAO, and how does it function?
- How do cross-chain bridges work?
- What are the challenges of scaling blockchain networks?
- How do you integrate an oracle into a blockchain application?