The answer is Azure Blob Storage with hot tier for 30 days, then lifecycle management to cool tier for 6 months, then archive tier. This solution is correct because it balances performance and cost: the hot tier provides fast retrieval for frequently accessed data during the first month, while lifecycle management policies automatically transition the data to cooler tiers as access drops, ultimately landing in the archive tier for the remaining 7-year compliance period at the lowest storage cost. On the AZ-305 exam, this scenario tests your understanding of Azure Blob Storage access tiers and lifecycle rules as a core cost-optimization strategy for compliance workloads. A common trap is choosing only the archive tier upfront, which would fail the fast retrieval requirement for the first month. Remember the mnemonic “Hot, Cool, Archive” for the three-tier lifecycle sequence, and always match the tier’s retrieval speed to the access pattern.
AZ-305 Design data storage solutions Practice Question
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 runs a data analytics workload that processes large amounts of unstructured data (images and videos). The data is accessed frequently for the first month, then rarely. They need to store the data cost-effectively for 7 years to meet compliance. The solution must support fast retrieval of data within the first month. Which Azure storage solution should they recommend?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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 with hot tier for 30 days, then lifecycle management to cool tier for 6 months, then archive tier
Azure Blob Storage with hot tier for the first 30 days meets the fast retrieval requirement for frequently accessed data, while lifecycle management automatically moves data to cool tier for 6 months and then to archive tier for the remaining 7-year compliance period, minimizing cost. The archive tier offers the lowest storage cost for rarely accessed data, and lifecycle policies ensure seamless transitions without manual intervention.
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.
✓
Azure Blob Storage with hot tier for 30 days, then lifecycle management to cool tier for 6 months, then archive tier
Why this is correct
Hot tier offers fast access for the first month; lifecycle management moves data to cool/archive to reduce cost.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Blob Storage with premium tier for 30 days, then lifecycle to archive tier
Why it's wrong here
Premium tier is optimized for low latency but is significantly more expensive than hot tier; not cost-effective.
✗
Azure Files with lifecycle management
Why it's wrong here
Azure Files is suitable for SMB/NFS file shares, not for large-scale unstructured data like images/videos.
✗
Azure Disk Storage with snapshots
Why it's wrong here
Disk storage is for VM disks, not for storing raw unstructured data; snapshots are incremental backups.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'premium' with 'fast retrieval' and overlook that the hot tier already provides low-latency access for frequently used data, while premium is overkill and cost-prohibitive for this workload.
Detailed technical explanation
How to think about this question
Azure Blob Storage lifecycle management uses rules based on 'last modified' or 'creation time' to transition blobs between hot, cool, and archive tiers, with the archive tier having a 180-day minimum retention period before deletion (unless early deletion fees apply). The cool tier offers lower storage costs but higher access costs and a 30-day minimum retention, making it ideal for data accessed infrequently after the first month. For compliance, immutability policies (e.g., WORM) can be applied to prevent modification or deletion during the 7-year retention.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Blob Storage with hot tier for 30 days, then lifecycle management to cool tier for 6 months, then archive tier — Azure Blob Storage with hot tier for the first 30 days meets the fast retrieval requirement for frequently accessed data, while lifecycle management automatically moves data to cool tier for 6 months and then to archive tier for the remaining 7-year compliance period, minimizing cost. The archive tier offers the lowest storage cost for rarely accessed data, and lifecycle policies ensure seamless transitions without manual intervention.
What should I do if I get this AZ-305 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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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