The answer is that the skillset resource was not deployed before the indexer. This is correct because ARM templates are processed sequentially, and when an indexer references a skillset via a dependency, that skillset must already exist in the deployment order; otherwise, the indexer fails with a "does not exist" error. On the Microsoft Azure AI Engineer Associate AI-102 exam, this tests your understanding of resource deployment dependencies in Azure AI Search, where the typical order is data source, then skillset, then index, and finally indexer—a common trap is assuming the indexer can create or reference a skillset out of sequence. The search intent keywords—ARM template skillset dependency indexer—highlight that the deployment order is critical, not the validity of other components like schedules or field mappings. Memory tip: think "D.S.I.I."—Data source, Skillset, Index, Indexer—to remember the correct deployment sequence.
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.
You deploy the ARM template shown in the exhibit to create an Azure AI Search indexer. The indexer fails to run, and you see an error that the skillset 'demo-skillset' does not exist. What is the most likely cause?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The skillset resource was not deployed before the indexer
Option A is correct because the ARM template references a skillset that has not been deployed. Option B is wrong because the data source is referenced but not necessarily missing. Option C is wrong because the schedule is valid. Option D is wrong because the field mapping is valid.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 field mapping source field 'metadata_storage_path' is incorrect
Why it's wrong here
Field mapping errors would not cause a missing skillset error.
✗
The schedule start time is in the past, causing the indexer to be disabled
Why it's wrong here
A past start time does not cause an error; it starts immediately.
✗
The data source 'demo-datasource' does not exist
Why it's wrong here
The error specifically mentions the skillset, not the data source.
✓
The skillset resource was not deployed before the indexer
Why this is correct
The indexer depends on the skillset, which must exist. The template does not include the skillset resource.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AI-102 NAT questions on configuration and troubleshooting.
Implement knowledge mining and information extraction solutions — This question tests Implement knowledge mining and information extraction solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The skillset resource was not deployed before the indexer — Option A is correct because the ARM template references a skillset that has not been deployed. Option B is wrong because the data source is referenced but not necessarily missing. Option C is wrong because the schedule is valid. Option D is wrong because the field mapping is valid.
What should I do if I get this AI-102 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AI-102 NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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