HTTP methods and status codes

Summary

Fluent, fast recall of what GET/POST/PUT/PATCH/DELETE mean and what the common status code ranges (2xx/3xx/4xx/5xx) signal — frequently tested as quick-fire questions.

• 1Make a flashcard set of common status codes (200, 201, 204, 301, 400, 401, 403, 404, 500) and drill them.
• 2Practice explaining the difference between 401 and 403 precisely.
• 3Know which methods are idempotent and which aren't.