What are Content-Type and Accept headers used for?
PICTURE THIS: A REST CALL
Simple meaning
Content-Type describes the body you are sending, for example application/json.
WHY — HTTP instead of guessing?
Why interviewers care about HTTP:
who only read docs from people who shipped.
and tied to Backend work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Content-Type describes the body
you are sending, for example application/json.
- 2Accept tells the server
what media types the client can handle.
- 3Mismatched Content-Type is a
common reason Spring returns 415 Unsupported Media Type.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Content-Type describes the body you are sending, for example application/json. Accept tells the server what media types the client can handle.