AI-102 Practice Question: Implement knowledge mining and information extraction solutions
You are implementing a knowledge mining solution for a legal firm. The solution must ingest large volumes of legal documents (PDFs and Word files) stored in Azure Blob Storage. You need to extract text, recognize named entities (e.g., parties, judges, case numbers), and index the content for full-text search. The solution should also support redaction of sensitive information before indexing. Which combination of Azure AI services should you use?
⚠ Common exam trap
Test-takers frequently confuse Azure AI Content Safety (for moderation) with redaction capabilities, or assume Azure AI Translator can handle entity recognition, when in fact redaction requires a custom skill and entity recognition requires Azure AI Language.
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
✓
Azure AI Document Intelligence, Azure AI Language, custom skill for redaction, and Azure AI Search
It combines Azure AI Document Intelligence for OCR and text extraction from PDFs and Word files, Azure AI Language for named entity recognition (e.g., parties, judges, case numbers), a custom skill for redaction (to remove sensitive information before indexing), and Azure AI Search to index the cleaned content for full-text search. This stack directly addresses all requirements: ingestion, entity extraction, redaction, and search indexing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure AI Document Intelligence, Azure AI Translator, and Azure AI Search
Why it's wrong here
Azure AI Translator performs language translation and cannot recognise or redact named entities such as parties or case numbers. It is tempting because translation is a text-processing service, but the scenario requires entity extraction and redaction, which Translator does not provide.
- ✗
Azure AI Document Intelligence, Azure AI Video Indexer, and Azure AI Search
Why it's wrong here
Azure AI Video Indexer processes video and audio media, so it cannot ingest PDFs or Word files. It is tempting because it extracts insights from unstructured content, but the scenario's document formats and entity-recognition requirement fall outside its media-focused capabilities.
- ✓
Azure AI Document Intelligence, Azure AI Language, custom skill for redaction, and Azure AI Search
Why this is correct
Azure AI Document Intelligence extracts text and layout from PDFs and Word files, while Azure AI Language performs named entity recognition for parties, judges and case numbers. A custom skill redacts sensitive content before indexing, satisfying the pre-indexing redaction constraint, and Azure AI Search delivers the required full-text search index.
- ✗
Azure AI Document Intelligence, Azure AI Content Safety, and Azure AI Search
Why it's wrong here
Azure AI Content Safety detects harmful content categories, not the named entities (parties, judges, case numbers) the solution must extract. It is tempting because it handles sensitive content, but redaction here depends on entity recognition, which Content Safety does not perform.
Quick reference
Azure Blob Storage Tier Comparison
| Tier | Storage Cost | Retrieval Cost | Latency | Use Case |
|---|---|---|---|---|
| Hot | Highest | Lowest | Immediate | Active data, frequent reads |
| Cool | Lower | Higher | Immediate | Data accessed < once / month |
| Cold | Lower still | Higher | Immediate | Data accessed < once / quarter |
| Archive | Lowest | Highest + rehydration delay | Hours | Long-term compliance retention |
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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.