Question 967 of 945
Implement knowledge mining and information extraction solutions →mediumMultiple ChoiceObjective-mapped
AI-102 Practice Question: Implement knowledge mining and information extraction solutions
You are using Azure AI Search to build a knowledge base for a customer support portal. The index includes a 'sentiment' field that should be populated using the Sentiment skill. However, the sentiment scores are not being written to the index. The skillset runs successfully. What is the most likely cause?
⚠ Common exam trap
A common mix-up: candidates assume a successful skillset execution guarantees data is written to the index, but Azure AI Search requires explicit output field mappings in the indexer to bridge skill outputs to index fields, and this step is often overlooked.
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 output field mapping for 'sentiment' is missing or incorrectly defined in the indexer.
The Sentiment skill outputs a 'double' value for sentiment score, but the indexer requires an explicit output field mapping to write that value into the index's 'sentiment' field. Even when a skillset runs successfully, without a correct output field mapping in the indexer definition, the skill's output is not transferred to the index. The indexer's field mappings control how enriched data flows from the skillset's output nodes to the index fields.
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 output field mapping for 'sentiment' is missing or incorrectly defined in the indexer.
Why this is correct
Without mapping, skill output is not written to index.
- ✗
The Sentiment skill is not correctly configured in the skillset.
Why it's wrong here
Skill ran successfully, so configuration is correct.
- ✗
The indexer is in a failed state and not processing documents.
Why it's wrong here
Indexer runs successfully.
- ✗
The sentiment field in the index is of type 'Collection(Edm.String)' but the skill outputs a double.
Why it's wrong here
Type mismatch would cause skill error, not silent failure.
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Last reviewed: Jul 4, 2026
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