Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is building a global real-time collaboration platform. The application data is stored as JSON documents and needs to be available for low-latency reads and writes from multiple geographic regions. The application must support multi-region writes so that users can update data from any region with automatic conflict resolution. The company wants a fully managed database service with a guaranteed SLA for availability and throughput. Which Azure data service should they choose?
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 with SQL API and multiple write regions
Cosmos DB supports multi-region writes, automatic conflict resolution, global distribution, low latency, and 99.999% availability. It is ideal for globally distributed real-time applications.
B
Distractor review
Azure SQL Database with active geo-replication
Active geo-replication creates a readable secondary but does not support multi-region writes. Writes go to a single primary, which would introduce latency for remote users.
C
Distractor review
Azure Table Storage
Azure Table Storage is a NoSQL key-value store with limited indexing and does not support multi-region writes or conflict resolution.
D
Distractor review
Azure Cache for Redis
Azure Cache for Redis is an in-memory cache, not a fully managed database with durable storage and multi-region write support.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
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.
Technical deep dive
How to think about this question
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.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Azure Cosmos DB with SQL API and multiple write regions — Azure Cosmos DB is a globally distributed, multi-model database service that supports multiple write regions, automatic conflict resolution (e.g., last-writer-wins or custom), and provides low-latency reads/writes. It offers a 99.999% availability SLA with multiple regions. Azure SQL Database with geo-replication supports only one write region (primary) and asynchronous replication to secondary. Azure Table Storage is a key-value store with limited query capabilities and does not support multi-region writes natively. Azure Cache for Redis is a cache, not a primary database.
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.
Discussion
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