React Skills Tests

React — Beginner

Components, JSX, props, state basics, and event handling. Mix of single-answer and multiple-answer items; multi-select questions ask you to select every correct statement.

JavaScript + React — Intermediate

DOM interaction patterns, hooks rules, controlled components, list rendering, and avoiding common footguns.

React — Intermediate

Effects, memoization, context, lists, and common event/state patterns. Includes single-select and multi-select items.

TypeScript + React + Next.js — Advanced

App Router boundaries, typing strategies, server data fetching, edge/runtime trade-offs, and production analytics concerns.

NestJS + React — Advanced

Advanced integration scenarios between a NestJS API and a React client: BFF boundaries, cookie-based auth, CORS with credentials, DTO validation, and structured error mapping for forms and global UI.

React + Next.js + Node.js — Advanced

Advanced full-path scenarios connecting React UI, Next.js App Router boundaries, and Node.js APIs across authentication, caching, streaming, uploads, and failure handling.

React — Advanced

Concurrent features, transitions, suspense data, performance traps, and composition at scale. Demanding single- and multi-select items.