AZ-204 Develop for Azure storage Practice Question
This AZ-204 practice question tests your understanding of develop for azure storage. 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
Refer to the exhibit. You run the Azure CLI command to list blobs in a container that are larger than 1 MB. The command returns no results even though you know there are blobs larger than 1 MB. 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.
Why wrong: Backticks are valid in JMESPath for literals. The syntax is acceptable.
B
The storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2)
When hierarchical namespace is enabled, the blob list output uses a different schema; the 'properties' object may not exist or be structured differently, causing the query to fail.
C
The --container-name parameter is case-sensitive
Why wrong: Container names are lowercase, but if it were wrong, the command would fail.
D
The --account-name parameter is incorrect
Why wrong: If the account name were wrong, the command would fail with an error, not return empty results.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2)
The Azure CLI command uses the `az storage blob list` command with a JMESPath query to filter blobs larger than 1 MB. However, when a storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2), the blob listing API returns directory entries and file entries in a flat list, but the `az storage blob list` command does not support the hierarchical namespace by default. The command may return no results because the underlying REST API (Blob Service REST API) does not properly enumerate blobs in a Data Lake Storage Gen2 account without using the `--use-hierarchical-namespace` flag or the `az storage fs file list` command instead. This is a known limitation where the standard blob list operation fails to list files in a hierarchical namespace-enabled account.
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 JMESPath query uses backticks incorrectly
Why it's wrong here
Backticks are valid in JMESPath for literals. The syntax is acceptable.
✓
The storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2)
Why this is correct
When hierarchical namespace is enabled, the blob list output uses a different schema; the 'properties' object may not exist or be structured differently, causing the query to fail.
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.
✗
The --container-name parameter is case-sensitive
Why it's wrong here
Container names are lowercase, but if it were wrong, the command would fail.
✗
The --account-name parameter is incorrect
Why it's wrong here
If the account name were wrong, the command would fail with an error, not return empty results.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the distinction between Azure Blob Storage and Azure Data Lake Storage Gen2, specifically that the `az storage blob list` command does not work as expected in hierarchical namespace accounts, leading candidates to overlook the storage account type as the root cause.
Trap categories for this question
Command / output trap
Container names are lowercase, but if it were wrong, the command would fail.
Detailed technical explanation
How to think about this question
Azure Data Lake Storage Gen2 accounts use a hierarchical namespace that organizes blobs into directories, which changes the way the Blob Service REST API enumerates objects. The `az storage blob list` command uses the `List Blobs` REST API (version 2019-12-12 or later), which for hierarchical namespace accounts requires the `x-ms-version` header and the `include=metadata` parameter to work correctly; without these, the API may return an empty list or only directory markers. In practice, for ADLS Gen2 accounts, you should use `az storage fs file list` (File System service) to list files, as it properly handles the hierarchical namespace.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2) — The Azure CLI command uses the `az storage blob list` command with a JMESPath query to filter blobs larger than 1 MB. However, when a storage account has hierarchical namespace enabled (Azure Data Lake Storage Gen2), the blob listing API returns directory entries and file entries in a flat list, but the `az storage blob list` command does not support the hierarchical namespace by default. The command may return no results because the underlying REST API (Blob Service REST API) does not properly enumerate blobs in a Data Lake Storage Gen2 account without using the `--use-hierarchical-namespace` flag or the `az storage fs file list` command instead. This is a known limitation where the standard blob list operation fails to list files in a hierarchical namespace-enabled account.
What should I do if I get this AZ-204 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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