Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is migrating a MongoDB-compatible application to Azure. The application requires low-latency reads and writes globally. It needs to support multi-region writes so that updates can be made from any region with automatic conflict resolution. The data is JSON documents that can vary in schema. The company wants a fully managed database service with native support for MongoDB APIs. 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
Distractor review
Azure SQL Database
Azure SQL Database is a relational database and does not support the MongoDB API or document data models. It is not suitable for MongoDB-based applications.
B
Best answer
Azure Cosmos DB with the API for MongoDB
Cosmos DB's API for MongoDB provides full MongoDB wire protocol compatibility, global distribution with multi-region writes, configurable consistency levels, and automatic conflict resolution. It is designed for low-latency, globally distributed applications.
C
Distractor review
Azure Database for MongoDB
There is no standalone Azure service named 'Azure Database for MongoDB'. The MongoDB support in Azure is provided by Cosmos DB. This option is misleading and incorrect.
D
Distractor review
Azure Cache for Redis
Azure Cache for Redis is a caching service based on Redis, not a document database. It does not support MongoDB APIs, multi-region writes, or conflict resolution.
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 the API for MongoDB — Azure Cosmos DB is a globally distributed, multi-model database service. It supports the MongoDB API (wire protocol compatibility) and offers multi-region writes with automatic conflict resolution. It also provides low-latency reads and writes, schema flexibility (JSON documents), and multiple consistency levels. Azure SQL Database is relational and does not support MongoDB API. Azure Database for MongoDB is not a native Azure service (the correct name is Azure Cosmos DB API for MongoDB). Azure Cache for Redis is a caching layer, 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.
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