Hard-level frontend interview questions covering advanced patterns, performance optimization, and complex architectures. Q1: Explain React Fiber architecture and reconciliation. Answer: Fiber Architecture Reconciliation Phases Priority Levels Concurrent Features 1import { useTransition, useDeferredValue } from …

Medium-level frontend interview questions covering advanced React, Vue, state management, and performance optimization. Q1: Explain React Context API and when to use it. Answer: Prop Drilling Problem Context Solution 1import { createContext, useContext, useState } from 'react'; 2 3// Create context 4const …

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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Paxos 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 …

Polkadot 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 …

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. Key Components: Relay Chain: Main chain providing security Parachains: Independent chains with dedicated slots Parathreads: …

Hard-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 // …

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 …

Comprehensive protocol design and distributed systems interview questions covering networking, communication protocols, and distributed consensus. Network Protocols Interview questions covering fundamental and advanced networking concepts: Easy: OSI model, TCP vs UDP, DNS, HTTP, REST APIs, WebSocket, authentication …

Easy-level Protocol Buffers interview questions covering basics, syntax, and fundamental concepts. Q1: What are Protocol Buffers and why use them? Answer: Protocol Buffers (protobuf) is a language-neutral, platform-neutral extensible mechanism for serializing structured data. Key Benefits: Efficiency: Smaller size than …

Hard-level Protocol Buffers interview questions covering advanced topics, performance optimization, and complex scenarios. Q1: How does Protocol Buffer encoding work internally? Answer: Varint Encoding: Variable-length encoding for integers Smaller numbers use fewer bytes Most significant bit indicates continuation …

Medium-level Protocol Buffers interview questions covering advanced features, schema evolution, and best practices. Q1: How do you handle schema evolution and backward compatibility? Answer: Backward Compatibility Rules: Never change field numbers: 1// ❌ BAD: Changing field number breaks compatibility 2message User { 3 …

Comprehensive research methodology and technical due diligence interview questions for evaluating technology, teams, and systems. Research Methodology Interview questions covering scientific research methods and experimental design: Easy: Research problem definition, literature review, basic experimental design, …