The answer is that the query returns failed deallocate operations on virtual machines during the last 24 hours. This is correct because the KQL query explicitly filters the Azure activity log for entries where the 'Status' field equals 'Failed' and the 'Operation' field equals 'Deallocate Virtual Machines', while the time range restricts the output to only those events occurring within the past 24 hours. On the AZ-104 exam, this type of question tests your ability to read and interpret Kusto Query Language (KQL) for monitoring and troubleshooting Azure VM lifecycle events, often appearing in scenario-based questions where you must identify the cause of a failed deallocation. A common trap is confusing the 'Operation' value with a similar one like 'Start Virtual Machine' or 'Stop Virtual Machine', so always check the exact wording. For a quick memory tip, remember the three Fs: Failed, Filter, and the last 24 hours—if any one is missing, the result set changes.
AZ-104 Monitor and Maintain Azure Resources Practice Question
This AZ-104 practice question tests your understanding of monitor and maintain azure resources. 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.
Exhibit
AzureActivity
| where TimeGenerated >= ago(24h)
| where OperationNameValue == "Microsoft.Compute/virtualMachines/deallocate/action"
| where ActivityStatusValue == "Failed"
AzureActivity
| where TimeGenerated >= ago(24h)
| where OperationNameValue == "Microsoft.Compute/virtualMachines/deallocate/action"
| where ActivityStatusValue == "Failed"
A
All successful deallocate operations on virtual machines during the last 24 hours.
Why wrong: The query explicitly filters for failed activity, not successful activity. Successful deallocations would require a different status value.
B
Failed deallocate operations on virtual machines during the last 24 hours.
The query filters the AzureActivity table to the last 24 hours, selects the virtual machine deallocate operation, and then limits results to records whose status is Failed. That combination means it returns only failed deallocation events for virtual machines in the time window shown.
C
Any operations related to starting or restarting virtual machines in the last 24 hours.
Why wrong: The query targets the deallocate action only. It does not include start or restart operations, so those events are excluded.
D
Administrative changes made only from the Azure portal in the last 24 hours.
Why wrong: The query does not filter by caller, client, or portal source. It only filters by time, operation name, and failed status.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Failed deallocate operations on virtual machines during the last 24 hours.
The query filters for 'Status' equal to 'Failed' and 'Operation' equal to 'Deallocate Virtual Machines', returning only failed deallocate operations. The time filter restricts results to the last 24 hours. Therefore, the query returns failed deallocate operations on virtual machines during the last 24 hours.
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.
✗
All successful deallocate operations on virtual machines during the last 24 hours.
Why it's wrong here
The query explicitly filters for failed activity, not successful activity. Successful deallocations would require a different status value.
✓
Failed deallocate operations on virtual machines during the last 24 hours.
Why this is correct
The query filters the AzureActivity table to the last 24 hours, selects the virtual machine deallocate operation, and then limits results to records whose status is Failed. That combination means it returns only failed deallocation events for virtual machines in the time window shown.
Related concept
Read the scenario before looking for a memorised answer.
✗
Any operations related to starting or restarting virtual machines in the last 24 hours.
Why it's wrong here
The query targets the deallocate action only. It does not include start or restart operations, so those events are excluded.
✗
Administrative changes made only from the Azure portal in the last 24 hours.
Why it's wrong here
The query does not filter by caller, client, or portal source. It only filters by time, operation name, and failed status.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overlook the explicit 'Status' filter and assume the query returns all deallocate operations, or confuse 'deallocate' with 'start' or 'restart' operations, leading them to select a wrong answer.
Detailed technical explanation
How to think about this question
The Activity Log in Azure Monitor captures all control-plane events, including virtual machine deallocation operations. The query uses Kusto Query Language (KQL) to filter on the 'Status' and 'Operation' fields, where 'Status' can be 'Succeeded', 'Failed', or 'Started'. In real-world scenarios, this query helps identify recurring deallocation failures due to resource locks, quota limits, or Azure Policy denials, enabling proactive remediation.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
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: Failed deallocate operations on virtual machines during the last 24 hours. — The query filters for 'Status' equal to 'Failed' and 'Operation' equal to 'Deallocate Virtual Machines', returning only failed deallocate operations. The time filter restricts results to the last 24 hours. Therefore, the query returns failed deallocate operations on virtual machines during the last 24 hours.
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.
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