This AZ-305 practice question tests your understanding of design data storage 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.
A company wants to automatically tier data between hot, cool, and archive access tiers based on last access time to optimize costs. Which Azure feature should they implement?
Azure Blob Storage lifecycle management
Lifecycle management automatically tiers data based on rules.
Azure Data Box
Why wrong: Azure Data Box is for offline data transfer.
Azure Backup
Why wrong: Azure Backup is for backup and recovery.
Azure File Sync
Why wrong: Azure File Sync is for syncing files across servers.
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
Azure Blob Storage lifecycle management allows you to define policies that automatically move blobs between hot, cool, and archive access tiers based on conditions such as last access time or age. This directly addresses the requirement to optimize costs by tiering data according to access patterns without manual intervention.
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 Blob Storage lifecycle management
Why this is correct
Lifecycle management automatically tiers data based on rules.
Related concept
Read the scenario before looking for a memorised answer.
Azure Data Box
Why it's wrong here
Azure Data Box is for offline data transfer.
Azure Backup
Why it's wrong here
Azure Backup is for backup and recovery.
Azure File Sync
Why it's wrong here
Azure File Sync is for syncing files across servers.
Common exam traps
The trap here is that candidates may confuse Azure File Sync's 'cloud tiering' feature with blob lifecycle management, but File Sync only tiers between local server and Azure Files (not between hot/cool/archive tiers) and does not use last access time for tiering decisions.
Detailed technical explanation
Lifecycle management policies are defined in JSON or via the Azure portal, using rules that filter by blob name prefix or index tags and specify actions like 'tierToCool' after 30 days or 'tierToArchive' after 180 days. The 'last access time' condition relies on the blob's 'LastAccessTime' property, which must be enabled via the 'last access time tracking' feature on the storage account. In real-world scenarios, this is critical for cost optimization in data lakes where infrequently accessed historical data can be automatically moved to cheaper storage without manual scripting.
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
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Blob Storage lifecycle management — Azure Blob Storage lifecycle management allows you to define policies that automatically move blobs between hot, cool, and archive access tiers based on conditions such as last access time or age. This directly addresses the requirement to optimize costs by tiering data according to access patterns without manual intervention.
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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