This DP-203 practice question tests your understanding of design and implement data 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.
You need to store historical sales data for 10 years with infrequent queries. The storage cost must be minimized while retaining the ability to query using Azure Synapse serverless SQL pool. Which storage tier should you use?
Azure Storage Archive tier.
Why wrong: Archive tier is offline; data must be rehydrated before querying.
Azure Storage Premium tier.
Why wrong: Premium tier is for low-latency, high-cost workloads.
Azure Storage Hot tier.
Why wrong: Hot tier is optimized for frequent access, higher cost.
Azure Storage Cool tier.
Cool tier provides low-cost storage for infrequent access and is online for queries.
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 Storage Cool tier.
The Cool tier is the correct choice because it provides low-cost storage for data that is infrequently accessed (e.g., historical sales data spanning 10 years) while still supporting immediate read access via Azure Synapse serverless SQL pool. Unlike the Archive tier, Cool tier data is online and can be queried without the need for time-consuming rehydration, making it suitable for infrequent but on-demand analytical queries.
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 Storage Archive tier.
Why it's wrong here
Archive tier is offline; data must be rehydrated before querying.
Azure Storage Premium tier.
Why it's wrong here
Premium tier is for low-latency, high-cost workloads.
Azure Storage Hot tier.
Why it's wrong here
Hot tier is optimized for frequent access, higher cost.
Azure Storage Cool tier.
Why this is correct
Cool tier provides low-cost storage for infrequent access and is online for queries.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse 'infrequent queries' with 'no queries' and incorrectly choose the Archive tier, forgetting that Azure Synapse serverless SQL pool cannot directly query archived data without a time-consuming rehydration process.
Detailed technical explanation
Azure Storage access tiers (Hot, Cool, and Archive) are managed at the blob level, with Cool tier offering lower storage costs than Hot but higher access costs per read operation. For serverless SQL pool queries, the data must be in an online tier (Hot or Cool); Archive blobs must first be rehydrated to Cool or Hot, which incurs additional time and cost. In a real-world scenario, a company storing 10 years of sales data might use Cool tier with lifecycle management policies to automatically transition older blobs to Archive only if queries become extremely rare, balancing cost and queryability.
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 and implement data storage — This question tests Design and implement data storage — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Storage Cool tier. — The Cool tier is the correct choice because it provides low-cost storage for data that is infrequently accessed (e.g., historical sales data spanning 10 years) while still supporting immediate read access via Azure Synapse serverless SQL pool. Unlike the Archive tier, Cool tier data is online and can be queried without the need for time-consuming rehydration, making it suitable for infrequent but on-demand analytical queries.
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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