A structured, example-driven guide to mastering React interviews — from fundamentals to senior-level system design.
- Job seekers preparing for React frontend interviews at any level
- Developers looking to solidify their React mental models
- Bootcamp grads bridging the gap between tutorials and real interviews
| Section | What's Inside |
|---|---|
| Fundamentals | JSX, components, props, state, events, lifecycle |
| Hooks | useState, useEffect, useContext, useReducer, useMemo, useCallback, custom hooks |
| Advanced | Performance, code splitting, lazy loading, error boundaries, portals, reconciliation |
| State Management | Redux, Redux Toolkit, Context API, Zustand, Recoil |
| System Design | Folder structure, state management, API handling, auth, scalability |
| Performance | Memoization, virtualization, rendering optimization |
| Testing | Jest, React Testing Library, unit vs integration |
| Interview Questions | 100+ Q&As across beginner, intermediate, and advanced levels + 6 coding challenges |
| Coding Examples | Controlled forms, custom hooks, data fetching, debounce/throttle |
| Cheatsheets | Hooks, lifecycle, Redux — quick revision references |
All diagrams are written in Mermaid and live inside the relevant .md files — no external images needed. They render automatically on GitHub.
A full collection of standalone diagrams (component tree, rendering pipeline, reconciliation, Redux flow, React Query cache lifecycle, and more) is available in assets/diagrams/.
Beginner → fundamentals/ → hooks/ → interview-questions/beginner.md
Intermediate → advanced/ → state-management/ → interview-questions/intermediate.md
Senior → system-design/ → performance/ → interview-questions/advanced.md
All levels → coding-examples/ → interview-questions/coding-challenges.md
Quick revision → cheatsheets/
Contributions are welcome — new questions, better examples, diagram improvements, or fixing typos. See CONTRIBUTING.md for guidelines.