AI-102 Plan and manage an Azure AI solution Practice Question
Your company uses Azure AI Vision to analyze images. You receive an alert that the number of 429 (Too Many Requests) errors has increased significantly. What is the most likely cause?
⚠ Common exam trap
Many exam-takers confuse HTTP 429 with authentication or authorization errors (401/403), leading candidates to incorrectly select options about API keys or role assignments when the real issue is rate limiting.
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
✓
The application is exceeding the transactions-per-second (TPS) limit.
HTTP 429 (Too Many Requests) is a rate-limiting response from Azure AI Vision when the client exceeds the allowed transactions-per-second (TPS) for the chosen pricing tier. The alert indicates the application is sending requests faster than the service's capacity, triggering throttling to protect backend resources.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The endpoint URL is incorrect.
Why it's wrong here
Incorrect endpoints cause 404 errors.
- ✗
The API key has expired.
Why it's wrong here
Expired keys cause authentication errors (401/403), not 429.
- ✗
The service principal does not have the correct role assignment.
Why it's wrong here
Insufficient permissions cause 403 errors.
- ✓
The application is exceeding the transactions-per-second (TPS) limit.
Why this is correct
429 errors occur when the request rate exceeds the allowed TPS.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AI-102 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AI-102 exam.