Easy-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 …

Hard-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: …

Medium-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: …

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 …

Core principles, consensus mechanisms, and key innovations of major blockchain platforms. Bitcoin (BTC) Core Principles Digital gold: Store of value, not programmable Decentralization: ~15,000 full nodes worldwide Security: Most secure blockchain (highest hash rate) Simplicity: Intentionally limited functionality …