Ouroboros consensus algorithm interview questions covering Cardano's Proof-of-Stake consensus mechanism. Q1: How does Ouroboros (Cardano) consensus work? Answer: Ouroboros is Cardano's Proof-of-Stake consensus algorithm. Sequence Diagram: Overall Flow Diagram: Individual Node Decision Diagram: Ouroboros Phases:
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Read MorePaxos consensus algorithm interview questions covering the classic distributed consensus protocol. Q1: How does Paxos consensus work? Answer: Paxos is a consensus algorithm for distributed systems that ensures agreement among nodes even with failures. Sequence Diagram: Overall Flow Diagram: Individual Node Decision …
Read MorePolkadot consensus algorithm interview questions covering Nominated Proof-of-Stake (NPoS) with BABE and GRANDPA. Q1: How does Polkadot (NPoS) consensus work? Answer: Polkadot uses Nominated Proof-of-Stake (NPoS) with BABE + GRANDPA. Sequence Diagram: Overall Flow Diagram: Individual Node Decision Diagram: Polkadot …
Read MoreEasy-level Polkadot interview questions covering blockchain basics, Substrate, and parachains. Q1: What is Polkadot and how does it work? Answer: Polkadot is a heterogeneous multi-chain protocol. Key Components: Relay Chain: Main chain providing security Parachains: Independent chains with dedicated slots Parathreads: …
Read MoreHard-level Polkadot interview questions covering advanced optimization and complex parachain design. Q1: How do you implement advanced runtime upgrades? Answer: Runtime Upgrades: 1pub struct CustomUpgrade; 2 3impl OnRuntimeUpgrade for CustomUpgrade { 4 fn on_runtime_upgrade() -> Weight { 5 // Migration logic 6 // …
Read MoreMedium-level Polkadot interview questions covering advanced Substrate development and parachain architecture. Q1: How do you implement custom consensus in Substrate? Answer: Custom Consensus: 1use sc_consensus::{BlockImport, BlockImportParams}; 2 3pub struct CustomBlockImport; 4 5impl BlockImport<Block> for …
Read MoreEasy-level Solana interview questions covering blockchain basics, programs, and development. Q1: What is Solana and how does it work? Answer: Solana is a high-performance blockchain designed for scalability. Key Features: High Throughput: 65,000+ TPS Low Latency: ~400ms block time Low Cost: ~$0.00025 per transaction …
Read MoreHard-level Solana interview questions covering advanced optimization, security, and complex program design. Q1: How do you implement advanced account compression and state optimization? Answer: State Compression: 1// Use Merkle trees for state 2use merkle_tree::MerkleTree; 3 4pub struct CompressedState { 5 tree: …
Read MoreMedium-level Solana interview questions covering advanced program development, optimization, and architecture. Q1: How do you implement cross-program invocations (CPIs)? Answer: CPI Basics: 1use solana_program::{ 2 program::invoke, 3 account_info::AccountInfo, 4}; 5 6pub fn call_other_program( 7 program_id: …
Read MoreSolana Proof of History Consensus Interview Questions
Solana consensus algorithm interview questions covering Proof of History (PoH) combined with Proof of Stake. Q1: How does Solana Proof of History (PoH) consensus work? Answer: Solana uses a unique consensus mechanism combining Proof of History (PoH) with Proof of Stake (PoS). PoH provides a cryptographic timestamp for …
Read MoreTendermint consensus algorithm interview questions covering the Byzantine Fault Tolerant consensus used in Cosmos chains. Q1: How does Tendermint consensus work? Answer: Tendermint is a Byzantine Fault Tolerant consensus algorithm used in Cosmos chains. Sequence Diagram: Overall Flow Diagram: Individual Node Decision …
Read MoreComprehensive Web3 and blockchain interview questions covering Ethereum, Solidity, DeFi, security, and advanced protocol design. Blockchain Fundamentals Core concepts every Web3 developer should know: Easy: Blockchain basics, Ethereum vs Bitcoin, smart contracts, gas, wallets, keys, ERC-20, NFTs, dApps, …
Read MoreEasy-level Web3 interview questions covering blockchain fundamentals, Ethereum, smart contracts, and decentralized applications. Q1: What is blockchain and how does it work? Answer: Block Structure Key Components: Block: Container of transactions Hash: Unique identifier (SHA-256) Previous Hash: Links to previous block …
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