Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company needs a fully managed NoSQL database for a new application with a key-value and document data model. They require single-digit millisecond latency at any scale, multi-region writes with automatic conflict resolution, and a serverless capacity option to handle unpredictable traffic. Which Azure data service should they use?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Azure Table Storage
Azure Table Storage is a NoSQL key-value store but does not support multi-region writes with automatic conflict resolution or serverless capacity. It also may not achieve single-digit millisecond latency at global scale.
B
Best answer
Azure Cosmos DB
Cosmos DB provides guaranteed single-digit millisecond latency, multi-region writes (multi-master), automatic conflict resolution, and a serverless mode that automatically scales capacity based on workload.
C
Distractor review
Azure Cache for Redis
Azure Cache for Redis is an in-memory cache, not a durable database. It does not provide multi-region writes with conflict resolution or serverless capacity as a primary data store.
D
Distractor review
Azure SQL Database
Azure SQL Database is a relational database, not a NoSQL key-value/document store. It does not natively support document models or multi-region writes with conflict resolution like Cosmos DB.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company is designing hub-and-spoke networking. Spoke VNets must use a central Azure Firewall for outbound internet traffic. Which two configurations are required?
Question 2
A company is designing private access to a PaaS database from workloads in a VNet. The database should not be reachable over its public endpoint. What should be recommended?
Question 3
A data platform must support analytical queries over petabytes of files in a data lake, while preserving hierarchical namespaces and fine-grained ACLs. Which storage service should you design around?
Question 4
A database workload has an RPO of 15 minutes and an RTO of 4 hours. Cost is more important than near-zero data loss. Which design is usually more appropriate than synchronous multi-region replication?
Question 5
A hub-and-spoke Azure network must centralize outbound inspection and still allow spokes to resolve private endpoint DNS names. Which two components are commonly required? (Choose 2.)
Question 6
A multinational company uses Microsoft Entra ID and several Azure subscriptions. Security administrators need to review privileged role assignments every month and require justification for continued access. Which design should be recommended?
FAQ
Questions learners often ask
What does this AZ-305 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Azure Cosmos DB — Azure Cosmos DB is a globally distributed, multi-model NoSQL database that supports key-value and document data. It offers single-digit millisecond latency, multi-region writes with automatic conflict resolution via its multi-master feature, and a serverless capacity mode that automatically scales based on demand. Azure Table Storage is limited to key-value and does not support multi-region writes. Azure Cache for Redis is an in-memory cache, not a primary database. Azure SQL Database is relational. Therefore, Cosmos DB is the correct choice.
What should I do if I get this AZ-305 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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