React — Advanced

Components, JSX, props, state basics, and event handling. Most items are a choice; the others ask for a prop name or whether a statement is true.

One screen where JavaScript values, listeners, and arrays meet React: a controlled field, effect cleanup, row identity, and a render error while mapping.

Effects, memoization, context, lists, and common event/state patterns. Most items are a choice; the others are true-or-false statements or the line that keeps a stale value.

One typed React screen on the Next.js App Router: server and client boundaries, props that cross them, edge checks before the page, and cache revalidation for that view.

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

Joint scenarios for a NestJS API and a React client: BFF boundaries, cookie sessions and CSRF, CORS with credentials, DTO validation, and structured errors for forms and global notices.