AI-102 Practice Question: Implement natural language processing solutions
This AI-102 practice question tests your understanding of implement natural language processing solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit. You have the following KQL query for monitoring Azure AI Language service usage:
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.COGNITIVESERVICES"
| where OperationName == "AnalyzeText"
| where TimeGenerated > ago(7d)
| summarize TotalCalls = count() by bin(TimeGenerated, 1d), StatusCode
| render timechart
You notice a spike in errors (HTTP 429) on a specific day. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Exhibit
Refer to the exhibit. You have the following KQL query for monitoring Azure AI Language service usage:
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.COGNITIVESERVICES"
| where OperationName == "AnalyzeText"
| where TimeGenerated > ago(7d)
| summarize TotalCalls = count() by bin(TimeGenerated, 1d), StatusCode
| render timechart
A
Network connectivity issues.
Why wrong: Network issues cause timeouts or 5xx errors, not 429.
B
The number of calls exceeded the rate limit for the service tier.
HTTP 429 indicates rate limiting.
C
Authentication tokens expired.
Why wrong: Expired tokens result in 401 Unauthorized.
D
Invalid API keys were used.
Why wrong: Invalid keys result in 401 Unauthorized.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The number of calls exceeded the rate limit for the service tier.
HTTP 429 (Too Many Requests) is a rate-limiting response that occurs when the number of API calls exceeds the allowed threshold for the service tier. In Azure AI services, each pricing tier has a specific requests-per-second (RPS) or requests-per-minute (RPM) limit, and exceeding this limit triggers a 429 error to protect backend resources.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Network connectivity issues.
Why it's wrong here
Network issues cause timeouts or 5xx errors, not 429.
✓
The number of calls exceeded the rate limit for the service tier.
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Authentication tokens expired.
Why it's wrong here
Expired tokens result in 401 Unauthorized.
✗
Invalid API keys were used.
Why it's wrong here
Invalid keys result in 401 Unauthorized.
Common exam traps
Common exam trap: answer the scenario, not the keyword
In Azure AI services, HTTP 429 indicates rate limiting rather than service unavailability. Candidates often confuse 429 with 503 (service unavailable) or authentication errors (401/403).
Detailed technical explanation
How to think about this question
Azure Cognitive Services enforce rate limits per resource and per region using a token bucket algorithm. For example, the Standard tier of Text Analytics allows 1,000 requests per minute (RPM) per region. When the bucket is empty, subsequent requests are rejected with a 429 response and a Retry-After header indicating the wait time. Implementing exponential backoff with jitter is the recommended retry strategy to avoid cascading failures.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Implement natural language processing solutions — This question tests Implement natural language processing solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The number of calls exceeded the rate limit for the service tier. — HTTP 429 (Too Many Requests) is a rate-limiting response that occurs when the number of API calls exceeds the allowed threshold for the service tier. In Azure AI services, each pricing tier has a specific requests-per-second (RPS) or requests-per-minute (RPM) limit, and exceeding this limit triggers a 429 error to protect backend resources.
What should I do if I get this AI-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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