AI-102 Practice Question: Implement knowledge mining and information extraction solutions
You are creating an Azure AI Search index that will be populated from an enrichment pipeline. You need to ensure that the original content of each document is searchable. Which index field should you map the document content to?
⚠ Common exam trap
Watch out — candidates often confuse the retrievable attribute with searchability, assuming that if a field is returned in results it must also be searchable, which is not the case.
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
✓
A field with the searchable attribute set to true
To make document content searchable, the index field must have the searchable attribute set to true. This enables full-text search capabilities, allowing users to query the content using keywords and phrases. Other attributes like filterable or retrievable serve different purposes and do not provide search functionality. Therefore, mapping content to a searchable field is essential.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A field with the key attribute set to true
Why it's wrong here
The key field uniquely identifies each document in the index. It is not used for storing the document's content and cannot be searched. Mapping document content to the key field would cause indexing failures because key fields have strict requirements (e.g., string, no analyzers). This is not the correct choice for making content searchable.
- ✗
A field with the retrievable attribute set to true
Why it's wrong here
Retrievable fields are returned in search results, but they are not necessarily searchable. The retrievable attribute only controls whether the field's value is included in the response. It does not enable full-text search. Without the searchable attribute, the field cannot be queried. Thus, this alone does not make content searchable.
- ✓
A field with the searchable attribute set to true
Why this is correct
A searchable field is analyzed and included in the full-text search index. By mapping the document content to a searchable field, you enable users to query the content using keywords. This is the standard way to make document text searchable. The searchable attribute must be set to true for the field to be queried.
- ✗
A field with the filterable attribute set to true
Why it's wrong here
Filterable fields are used in OData filter expressions but are not full-text searchable. While they can be used for exact matches, they do not support linguistic analysis or relevance scoring. Mapping document content to a filterable-only field would not allow users to search within the text. Therefore, it is not suitable for making content searchable.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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