Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company needs a fully managed NoSQL database for a JSON document-oriented application that requires low latency (single-digit milliseconds) for reads and writes at any scale. The application will run globally and needs multi-region writes with automatic failover. Which Azure data store 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
Best answer
Azure Cosmos DB
Cosmos DB offers multi-region writes, elastic scalability, and guarantees single-digit millisecond latency at the 99th percentile. It supports document models natively.
B
Distractor review
Azure Table Storage
Azure Table Storage is a NoSQL key-value store but does not support multi-region writes or automatic failover. Latency is higher and scaling is more manual.
C
Distractor review
Azure SQL Database
Azure SQL Database is a relational database engine, not a NoSQL document store. It does not natively store JSON documents as primary data.
D
Distractor review
Azure Cache for Redis
Azure Cache for Redis is an in-memory data store primarily used for caching and session state. It is not a durable NoSQL database for global writes with automatic failover.
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 database service designed for low-latency, high-availability, and multi-region writes. It supports automatic failover and provides turnkey global distribution with SLAs for latency, availability, and consistency. Azure Table Storage does not support multi-region writes. Azure SQL Database is a relational database, not a NoSQL document store. Azure Cache for Redis is a caching layer, not a primary data store.
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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