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Explain the main HTTP status code families.

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Explain the main HTTP status code families.

🧠Mind Map Answer

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2xxSuccess — 200 OK, 201 Created, 204 No Content
3xxRedirect — 301 Moved, 304 Not Modified
4xxClient error — 400, 401, 403, 404, 429
5xxServer error — 500, 502, 503

Quick read: 4xx is 'you messed up', 5xx is 'we messed up'.

🔥What If?

Think Beyond the Expected

What is the difference between 401 and 403?

401 Unauthorized means 'we don't know who you are' (authenticate first). 403 Forbidden means 'we know who you are, but you are not allowed here'.

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Plain-language foundations

I'm preparing for a software engineering interview and want to understand this from scratch, as a beginner.

Topic: Status Codes (REST APIs)
Interview question: "Explain the main HTTP status code families."

Please:
1. Explain the core idea in simple, plain language, using an everyday analogy.
2. Define any technical terms you use.
3. Walk through one small, concrete example.
4. Finish with a single sentence I can easily remember.

Keep the tone friendly and assume I'm new to this topic.
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