This AZ-204 practice question tests your understanding of develop for azure storage. 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.
Your application uses Azure Blob Storage to store images. You need to automatically move blobs older than 30 days to the Cool tier and delete blobs older than 365 days. What should you implement?
Azure Automation runbook on a schedule
Why wrong: Possible but not the recommended native solution.
Azure Logic Apps with recurrence trigger
Why wrong: Could work but lifecycle management is simpler.
Azure Blob Storage lifecycle management policy
Lifecycle management can tier and delete blobs based on age.
Azure Event Grid subscription with blob created event
Why wrong: Event Grid triggers on events, not periodic cleanup.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Blob Storage lifecycle management policy
Azure Blob Storage lifecycle management policies allow you to define rules that automatically transition blobs to cooler tiers (e.g., Cool) after a specified number of days and delete them after a different number of days. This is the native, cost-effective, and fully managed solution for automating tier transitions and deletions based on blob age, without requiring external compute or orchestration services.
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.
Azure Automation runbook on a schedule
Why it's wrong here
Possible but not the recommended native solution.
Azure Logic Apps with recurrence trigger
Why it's wrong here
Could work but lifecycle management is simpler.
Azure Blob Storage lifecycle management policy
Why this is correct
Lifecycle management can tier and delete blobs based on age.
Related concept
Read the scenario before looking for a memorised answer.
Azure Event Grid subscription with blob created event
Why it's wrong here
Event Grid triggers on events, not periodic cleanup.
Common exam traps
The trap here is that candidates often over-engineer the solution by choosing Azure Automation or Logic Apps for scheduled tasks, not realizing that Azure Blob Storage has a built-in, serverless lifecycle management feature that directly handles age-based tiering and deletion without any external compute or orchestration.
Detailed technical explanation
Lifecycle management policies are defined as JSON rules on a storage account, evaluated approximately once per day by the Azure Storage service. The policy uses the `daysAfterModificationGreaterThan` filter to calculate blob age based on the `Last-Modified` timestamp, and supports actions like `tierToCool` and `delete`. A subtle behavior is that the policy applies to all blobs in the account unless scoped by prefix or blob index tags, and the evaluation is eventually consistent—changes may take up to 24 hours to take effect.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
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FAQ
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Blob Storage lifecycle management policy — Azure Blob Storage lifecycle management policies allow you to define rules that automatically transition blobs to cooler tiers (e.g., Cool) after a specified number of days and delete them after a different number of days. This is the native, cost-effective, and fully managed solution for automating tier transitions and deletions based on blob age, without requiring external compute or orchestration services.
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 24, 2026
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