This DP-900 practice question tests your understanding of describe considerations for working with non-relational data on azure. 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 JSON documents for a web application that requires low-latency reads and writes globally. The data has no fixed schema. Which Azure service should you use?
Azure Table Storage
Why wrong: Table Storage is key-value, not suitable for JSON document queries.
Azure Blob Storage
Why wrong: Blob Storage is for unstructured objects, not low-latency document queries.
Azure SQL Database
Why wrong: SQL Database requires a fixed schema and is relational.
Azure Cosmos DB
Cosmos DB provides global distribution, low latency, and native JSON support.
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 a globally distributed, multi-model database that natively supports JSON documents with low-latency reads and writes. Option A is wrong because Azure Blob Storage is not optimized for low-latency document queries. Option B is wrong because Azure Table Storage is a key-value store, not ideal for complex JSON queries. Option D is wrong because Azure SQL Database is relational and requires a fixed schema.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 key-value, not suitable for JSON document queries.
Azure Blob Storage
Why it's wrong here
Blob Storage is for unstructured objects, not low-latency document queries.
Azure SQL Database
Why it's wrong here
SQL Database requires a fixed schema and is relational.
Azure Cosmos DB
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-900 NAT questions on configuration and troubleshooting.
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FAQ
Describe considerations for working with non-relational data on Azure — This question tests Describe considerations for working with non-relational data on Azure — Static NAT maps one inside address to one outside address..
The correct answer is: Azure Cosmos DB — Azure Cosmos DB is a globally distributed, multi-model database that natively supports JSON documents with low-latency reads and writes. Option A is wrong because Azure Blob Storage is not optimized for low-latency document queries. Option B is wrong because Azure Table Storage is a key-value store, not ideal for complex JSON queries. Option D is wrong because Azure SQL Database is relational and requires a fixed schema.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-900 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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