Quick Answer
The answer is Azure Cosmos DB and Azure Blob Storage. This combination is correct because Azure Cosmos DB provides a hybrid global low-latency database with turnkey global distribution, enabling multi-region reads and writes for users worldwide, while Azure Blob Storage offers durable archival storage through its Cool and Archive access tiers, ideal for long-term compliance retention of transaction logs or invoices. On the DP-203 exam, this scenario tests your understanding of pairing a globally distributed operational store with a cost-effective archival layer, a common pattern for global e-commerce platforms. A frequent trap is selecting Azure SQL Database for low latency, but it lacks native multi-region write capabilities; instead, remember that Cosmos DB is the go-to for global low-latency database needs. Memory tip: “Cosmos for global speed, Blob for long-term keep.”
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 are designing a hybrid data storage architecture for a global e-commerce platform. Which two Azure services should you combine to achieve low-latency read access for users worldwide and durable archival storage for compliance?
Azure Table Storage
Why wrong: Table Storage is a single-region service with higher latency.
Azure SQL Database
Why wrong: Global distribution requires complex sharding and is not as seamless as Cosmos DB.
Azure Files
Why wrong: Not designed for archival or global low-latency reads.
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 Cosmos DB
Azure Cosmos DB is correct because it provides globally distributed, multi-region write and read capabilities with turnkey global distribution, enabling low-latency access for users worldwide via its multi-homing API. Azure Blob Storage is correct because it offers durable, tiered archival storage (e.g., Cool, Archive access tiers) at low cost, meeting compliance requirements for long-term retention of data such as transaction logs or invoices.
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 Table Storage
Why it's wrong here
Table Storage is a single-region service with higher latency.
Azure SQL Database
Why it's wrong here
Global distribution requires complex sharding and is not as seamless as Cosmos DB.
Azure Files
Why it's wrong here
Not designed for archival or global low-latency reads.
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The DP-203 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is wrong here
Table Storage is a single-region service with higher latency.
Why this is wrong here
Global distribution requires complex sharding and is not as seamless as Cosmos DB.
Why this is wrong here
Not designed for archival or global low-latency reads.
Analysis generated from the official DP-203blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
The trap here is that candidates often confuse Azure Table Storage with Cosmos DB's Table API, assuming Table Storage supports global distribution, when in fact only Cosmos DB's Table API (a different service) provides multi-region replication and low-latency reads.
Detailed technical explanation
Azure Cosmos DB achieves low-latency reads by replicating data across any number of Azure regions, using a multi-master model with consistency levels ranging from strong to eventual; each read is served from the nearest region with a latency under 10 ms at the 99th percentile. Azure Blob Storage's Archive access tier stores data offline with a retrieval time of up to 15 hours, but it meets compliance requirements like SEC Rule 17a-4(f) by supporting immutable storage with legal hold and time-based retention policies via Blob immutability policies.
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 Cosmos DB — Azure Cosmos DB is correct because it provides globally distributed, multi-region write and read capabilities with turnkey global distribution, enabling low-latency access for users worldwide via its multi-homing API. Azure Blob Storage is correct because it offers durable, tiered archival storage (e.g., Cool, Archive access tiers) at low cost, meeting compliance requirements for long-term retention of data such as transaction logs or invoices.
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 11, 2026
This DP-203 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-203 exam.
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