AI-102 Practice Question: Implement knowledge mining and information extraction solutions
This AI-102 practice question tests your understanding of implement knowledge mining and information extraction solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Network Topology
You executed the Azure CLI command shown to create an indexer. However, the indexer fails to run. The error indicates that the data source connection string is invalid. You have verified that the connection string is correct. What is the most likely issue?
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.
Network Topology
A
The --query parameter is incorrectly formatted
Why wrong: The query is optional and not causing the error.
B
The skillset name does not exist in the search service
Why wrong: Would cause a different error.
C
The parsingMode should be 'json' for PDF files
Why wrong: Default is fine for PDFs.
D
The data source's connection string is not properly stored or the data source is not configured with the correct credentials
The error indicates invalid connection string; the data source definition likely has a wrong or expired key.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The data source's connection string is not properly stored or the data source is not configured with the correct credentials
The error message explicitly states that the data source connection string is invalid, even though you have verified the string itself is correct. This typically occurs when the connection string is not stored correctly in the search service (e.g., it was truncated, escaped improperly, or contains special characters that were misinterpreted) or when the data source configuration lacks the correct credentials (e.g., the managed identity is not enabled, or the key/secret is missing). Option D directly addresses this mismatch between a verified string and the service's stored configuration.
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.
✗
The --query parameter is incorrectly formatted
Why it's wrong here
The query is optional and not causing the error.
✗
The skillset name does not exist in the search service
Why it's wrong here
Would cause a different error.
✗
The parsingMode should be 'json' for PDF files
Why it's wrong here
Default is fine for PDFs.
✓
The data source's connection string is not properly stored or the data source is not configured with the correct credentials
Why this is correct
The error indicates invalid connection string; the data source definition likely has a wrong or expired key.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a 'verified correct' connection string means the data source is fully configured, but Azure Cognitive Search stores the string independently and may silently alter it during ingestion, or the credentials (like a managed identity) may not be properly assigned to the search service.
Detailed technical explanation
How to think about this question
When you create an indexer via Azure CLI, the connection string is stored as a secure string in the search service's data source definition. If the string contains characters like semicolons, ampersands, or spaces that are not properly escaped in the JSON payload, the service may store a truncated or malformed version. Additionally, if the data source uses a managed identity (e.g., for Azure SQL or Blob Storage), the connection string must omit the account key and instead include 'Identity=SystemAssigned'; a mismatch here would cause the service to reject the connection despite the string appearing correct to the user.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 knowledge mining and information extraction solutions — This question tests Implement knowledge mining and information extraction solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The data source's connection string is not properly stored or the data source is not configured with the correct credentials — The error message explicitly states that the data source connection string is invalid, even though you have verified the string itself is correct. This typically occurs when the connection string is not stored correctly in the search service (e.g., it was truncated, escaped improperly, or contains special characters that were misinterpreted) or when the data source configuration lacks the correct credentials (e.g., the managed identity is not enabled, or the key/secret is missing). Option D directly addresses this mismatch between a verified string and the service's stored configuration.
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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