- A
AzureActivity | where TimeGenerated > ago(24h) | where OperationNameValue has_any ("Microsoft.Compute/virtualMachines/deallocate/action", "Microsoft.Compute/virtualMachines/powerOff/action")
This query filters the AzureActivity table to the last 24 hours and then matches the VM stop-related operations you need to review.
- B
AzureActivity | summarize count() by OperationNameValue
Why wrong: This query only counts operations and does not filter to the recent 24-hour window or the stop-related actions.
- C
AzureActivity | where ResourceType == "Microsoft.Compute/virtualMachines" | project TimeGenerated, ResourceGroup
Why wrong: This query lists VM-related records, but it does not restrict the results to stop or deallocate events.
- D
AzureActivity | sort by TimeGenerated asc
Why wrong: This query only sorts the data and does not filter for the time range or the VM operations you are investigating.
Querying AzureActivity for VM Stop/Deallocate Events
This AZ-104 practice question tests your understanding of monitor and maintain azure resources. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
In Log Analytics, you need to find AzureActivity records for VM stop or deallocate operations from the last 24 hours. Which query should you use?
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
AzureActivity | where TimeGenerated > ago(24h) | where OperationNameValue has_any ("Microsoft.Compute/virtualMachines/deallocate/action", "Microsoft.Compute/virtualMachines/powerOff/action")
Option A is correct because it uses the `has_any` operator to filter AzureActivity records for the exact operation names corresponding to VM stop (powerOff) and deallocate actions, and it restricts the time range to the last 24 hours using `ago(24h)`. This directly matches the requirement to find VM stop or deallocate operations within the specified timeframe.
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.
- ✓
AzureActivity | where TimeGenerated > ago(24h) | where OperationNameValue has_any ("Microsoft.Compute/virtualMachines/deallocate/action", "Microsoft.Compute/virtualMachines/powerOff/action")
Why this is correct
This query filters the AzureActivity table to the last 24 hours and then matches the VM stop-related operations you need to review.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AzureActivity | summarize count() by OperationNameValue
Why it's wrong here
This query only counts operations and does not filter to the recent 24-hour window or the stop-related actions.
When this WOULD be correct
When the question asks 'How many AzureActivity records exist for each OperationNameValue?' without time or resource type filters, this query would be correct.
- ✗
AzureActivity | where ResourceType == "Microsoft.Compute/virtualMachines" | project TimeGenerated, ResourceGroup
Why it's wrong here
This query lists VM-related records, but it does not restrict the results to stop or deallocate events.
When this WOULD be correct
This query would be correct if the question asked: 'Find all AzureActivity records for virtual machines, showing only the time generated and resource group.'
- ✗
AzureActivity | sort by TimeGenerated asc
Why it's wrong here
This query only sorts the data and does not filter for the time range or the VM operations you are investigating.
When this WOULD be correct
This query would be correct if the question asked: 'You need to list all AzureActivity records in chronological order from oldest to newest.'
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓AzureActivity | where TimeGenerated > ago(24h) | where OperationNameValue has_any ("Microsoft.Compute/virtualMachines/deallocate/action", "Microsoft.Compute/virtualMachines/powerOff/action")Correct answer▾
Why this is correct
This query filters the AzureActivity table to the last 24 hours and then matches the VM stop-related operations you need to review.
✗AzureActivity | summarize count() by OperationNameValueWrong answer — click to see why▾
Why this is wrong here
This query summarizes the count of all operations but does not filter for VM stop/deallocate operations or the last 24 hours, so it fails to meet the question's requirements.
★ When this WOULD be the correct answer
When the question asks 'How many AzureActivity records exist for each OperationNameValue?' without time or resource type filters, this query would be correct.
Why candidates choose this
Candidates may think summarizing counts is a quick way to see operations, but they overlook the specific filtering needed for time and operation type.
✗AzureActivity | where ResourceType == "Microsoft.Compute/virtualMachines" | project TimeGenerated, ResourceGroupWrong answer — click to see why▾
Why this is wrong here
This query filters by ResourceType but does not filter by time (last 24 hours) or by specific operations (stop/deallocate), so it returns all VM records regardless of time or operation, not meeting the requirement.
★ When this WOULD be the correct answer
This query would be correct if the question asked: 'Find all AzureActivity records for virtual machines, showing only the time generated and resource group.'
Why candidates choose this
Candidates may think filtering by ResourceType is sufficient and overlook the need for time and operation filters, or they may confuse 'project' with filtering operations.
✗AzureActivity | sort by TimeGenerated ascWrong answer — click to see why▾
Why this is wrong here
This query only sorts records by TimeGenerated in ascending order without filtering for the last 24 hours or specific VM stop/deallocate operations, so it returns all AzureActivity records sorted by time, not the required subset.
★ When this WOULD be the correct answer
This query would be correct if the question asked: 'You need to list all AzureActivity records in chronological order from oldest to newest.'
Why candidates choose this
Candidates may think sorting by time is necessary to find recent events, but they overlook the need for time filtering and operation-specific filtering.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the `has_any` operator with `contains` or `in`, or forget to include the time filter, leading them to select options that either don't filter by operation type or don't restrict the time window.
Detailed technical explanation
How to think about this question
The `has_any` operator in Kusto Query Language (KQL) performs a case-insensitive substring match against a list of strings, which is efficient for filtering operation names that contain the specified action identifiers. The `ago(24h)` function returns a datetime value representing 24 hours before the current time, and when used in a `where` clause with `TimeGenerated`, it creates a time-bounded query that leverages the table's time-partitioning for faster execution. In real-world scenarios, you might also need to consider that `powerOff` is the operation for stopping a VM while `deallocate` releases the underlying hardware, and both are distinct actions in Azure Resource Manager.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Monitor and Maintain Azure Resources — This question tests Monitor and Maintain Azure Resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AzureActivity | where TimeGenerated > ago(24h) | where OperationNameValue has_any ("Microsoft.Compute/virtualMachines/deallocate/action", "Microsoft.Compute/virtualMachines/powerOff/action") — Option A is correct because it uses the `has_any` operator to filter AzureActivity records for the exact operation names corresponding to VM stop (powerOff) and deallocate actions, and it restricts the time range to the last 24 hours using `ago(24h)`. This directly matches the requirement to find VM stop or deallocate operations within the specified timeframe.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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