AI-103 Computer Vision Practice Question
You need to programmatically delete an iteration of a Custom Vision model that performed poorly. Which API method should you invoke?
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
✓
DELETE /customvision/v3.3/Training/{projectId}/iterations/{iterationId}
Deleting an iteration in Custom Vision is performed via a DELETE request on the Training API iteration endpoint.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DELETE /customvision/v3.3/Training/{projectId}/iterations/{iterationId}
Why this is correct
This is the correct REST endpoint for deleting a specific Custom Vision model iteration.
- ✗
PUT /customvision/v3.3/Training/{projectId}/iterations/{iterationId}
Why it's wrong here
PUT is used for updating or creating resources.
- ✗
GET /customvision/v3.3/Training/{projectId}/iterations/{iterationId}/purge
Why it's wrong here
GET requests are used for retrieving data, not deleting.
- ✗
POST /customvision/v3.3/Training/{projectId}/iterations/{iterationId}/delete
Why it's wrong here
Custom Vision uses the HTTP DELETE method, not POST, for resource deletion.
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Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Microsoft exam blueprint
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