Implement knowledge mining and information extraction solutions →mediumMultiple ChoiceObjective-mapped
AI-102 Practice Question: Implement knowledge mining and information extraction solutions
You are troubleshooting an Azure AI Search indexer that fails to index a PDF file stored in Azure Blob Storage. The error message indicates that the document is encrypted. What is the most likely cause and solution?
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 PDF is encrypted; remove encryption before indexing
Azure AI Search cannot index encrypted documents; the solution is to remove encryption before indexing. Option A is incorrect: the indexer does not require a specific PDF parser; it can index PDFs by default with the appropriate skillset. Option B is incorrect: unsupported file formats would generate a different error, and encryption is not a format issue. Option C is incorrect: file size limits exist (up to 16 MB for PDFs), but the error specifically mentions encryption, not size.
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 indexer is not configured with the PDF parser; set the parsing mode
Why it's wrong here
PDF parser is default; encryption is the problem.
- ✗
The file format is unsupported; convert to PDF/A
Why it's wrong here
PDF is supported; encryption is the issue.
- ✗
The file is too large; split it into smaller parts
Why it's wrong here
Size limits are separate from encryption errors.
- ✓
The PDF is encrypted; remove encryption before indexing
Why this is correct
Encrypted documents cannot be processed; decryption is required.
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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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.