HTTP methods, headers, and status codes

What you’ll practice

From GET vs POST to cache-control and redirects, this quiz helps you recognize how HTTP behaves on the wire and how browsers and APIs interpret responses.

Each question has 4 options and there’s no timer, so you can reason through edge cases and learn from mistakes without pressure.

Difficulty and question settings

Difficulty is mixed by design: you’ll see quick fundamentals (like 200/404) alongside trickier cases (like 206, 304, CORS-related headers, and idempotency). Choose your preferred question count and difficulty before starting to tailor the session to a quick refresher or a deeper workout.

Common pitfalls to avoid

Many wrong answers come from mixing up safe vs idempotent methods, confusing similar status codes, or assuming a header works the same in requests and responses.

• Confusing 401 (auth required) with 403 (forbidden)
• Treating POST as “always non-idempotent” without context
• Mixing up 301 vs 302 vs 307/308 redirect behavior
• Forgetting when 304 is valid and what it implies about the response body
• Misreading caching headers like Cache-Control, ETag, and Expires

Tips for better scores

Read the scenario carefully: small wording differences often signal whether the best answer is about semantics (method choice), transport behavior (headers), or outcome (status code). If you miss a question, revisit the underlying rule and try a shorter set at the same difficulty to reinforce it.