Easy-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. graph TB A[Polkadot] --> B[Relay Chain] A --> C[Parachains] A --> D[Parathreads] B --> E[Validators] B --> F[Collators] B …

Medium-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 …