Quick Answer
The answer is a single key string. This is correct because the `az cognitiveservices account keys list` command returns a JSON object containing both key1 and key2 by default, but the `--query keys[0]` parameter applies a JMESPath filter that extracts only the first element from the keys array, which is key1, outputting it as a plain string. On the Microsoft Azure AI Engineer Associate AI-102 exam, this tests your ability to manipulate Azure CLI output using query syntax, a common task when automating resource access or integrating Cognitive Services into applications. A frequent trap is assuming the command returns both keys or a full JSON object when a query filter is applied, so always check for the `--query` parameter. Memory tip: think of `keys[0]` as “key number one” — the index zero always grabs the first item in the list, just like array indexing in programming.
This AI-102 practice question tests your understanding of implement computer vision solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. You run the Azure CLI command shown. What is the output?
A single key string
The query extracts key1 as a string.
Both key1 and key2
Why wrong: The query limits to key1.
The endpoint URL
Why wrong: The command is for keys, not endpoints.
The region of the account
Why wrong: Keys do not include region.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
A single key string
The `az cognitiveservices account keys list` command retrieves the access keys for an Azure Cognitive Services account. By default, it returns both key1 and key2, but the `--query` parameter with `keys[0]` filters the output to return only the first key (key1) as a single string. This is a standard Azure CLI query syntax using JMESPath to extract a specific element from the JSON response.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
A single key string
Why this is correct
The query extracts key1 as a string.
Related concept
Read the scenario before looking for a memorised answer.
Both key1 and key2
Why it's wrong here
The query limits to key1.
The endpoint URL
Why it's wrong here
The command is for keys, not endpoints.
The region of the account
Why it's wrong here
Keys do not include region.
Common exam traps
Microsoft often tests the distinction between retrieving keys versus other account properties (like endpoint or region), and the trap here is that candidates assume `keys list` returns all keys by default without recognizing that the `--query` parameter can filter to a single key.
Trap categories for this question
Command / output trap
The command is for keys, not endpoints.
Detailed technical explanation
The Azure CLI uses JMESPath for query expressions, where `keys[0]` accesses the first element of the `keys` array in the JSON response. The `az cognitiveservices account keys list` command returns a JSON object with `key1` and `key2` strings; the `--query` parameter allows server-side filtering to reduce bandwidth and simplify output. In real-world scenarios, you might use `--query key1` directly (without brackets) to get the string value, but `keys[0]` works because the response is an array-like structure with ordered keys.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Implement computer vision solutions — This question tests Implement computer vision solutions — Read the scenario before looking for a memorised answer..
The correct answer is: A single key string — The `az cognitiveservices account keys list` command retrieves the access keys for an Azure Cognitive Services account. By default, it returns both key1 and key2, but the `--query` parameter with `keys[0]` filters the output to return only the first key (key1) as a single string. This is a standard Azure CLI query syntax using JMESPath to extract a specific element from the JSON response.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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