200-901 Understanding and Using APIs Practice Question
A developer is making a GET request to a REST API and needs to specify that the response should be in JSON format. Which HTTP header should be set?
⚠ Common exam trap
Cisco often tests the distinction between Content-Type (for request body) and Accept (for response body), leading candidates to mistakenly choose Content-Type because they confuse 'sending' data with 'receiving' data.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Accept
The Accept header is used by the client to tell the server which media types (e.g., application/json) it can understand and prefers for the response. In a GET request, the client does not send a body, so Content-Type is irrelevant for specifying the response format. Setting Accept: application/json ensures the server returns JSON if it supports that format.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Content-Type
Why it's wrong here
Content-Type indicates the format of the request body.
- ✗
User-Agent
Why it's wrong here
User-Agent identifies the client software.
- ✗
Authorization
Why it's wrong here
Authorization carries credentials.
- ✓
Accept
Why this is correct
Accept specifies the desired response format.
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Written by Johnson Ajibi, MSc IT Security
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