The answer is Azure Database for MariaDB, which is the correct choice because it is the specific Azure service that delivers a fully managed MariaDB database in the cloud, handling all underlying infrastructure tasks like patching, backups, and high availability. MariaDB is a community-driven fork of MySQL, and this managed service ensures you get enterprise-grade reliability without the operational overhead of managing a virtual machine or installing the database yourself. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of Azure’s platform-as-a-service database offerings, often appearing alongside similar services like Azure Database for MySQL and PostgreSQL. A common trap is confusing Azure Database for MariaDB with Azure SQL Database or SQL Managed Instance, but remember that MariaDB is open-source and MySQL-compatible, not Microsoft’s proprietary SQL engine. For a quick memory tip, think “MariaDB = MySQL’s cousin, managed by Azure” to keep it distinct from other database services.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
Which Azure database service provides a fully managed MariaDB database in the cloud?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Database for MariaDB
Azure Database for MariaDB is the correct answer because it is the specific Azure service designed to provide a fully managed, enterprise-ready MariaDB database in the cloud. MariaDB is a community-developed fork of MySQL, and Azure offers a dedicated managed service for it, including built-in high availability, automated backups, and scaling, without requiring you to manage the underlying infrastructure.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Azure Database for MySQL
Why it's wrong here
Azure Database for MySQL uses MySQL engine; MariaDB and MySQL are separate managed services in Azure.
✓
Azure Database for MariaDB
Why this is correct
Azure Database for MariaDB is the fully managed service for MariaDB workloads.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure SQL Database
Why it's wrong here
Azure SQL Database uses Microsoft SQL Server engine, not MariaDB.
✗
Azure Database for PostgreSQL
Why it's wrong here
Azure Database for PostgreSQL uses the PostgreSQL engine, not MariaDB.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse MariaDB with MySQL due to their shared history and wire compatibility, leading them to incorrectly select Azure Database for MySQL instead of the dedicated Azure Database for MariaDB service.
Detailed technical explanation
How to think about this question
Under the hood, Azure Database for MariaDB runs the MariaDB Community Server and provides a PaaS offering that includes automatic patching, geo-redundant backups, and up to 99.99% availability SLA when configured with zone-redundant high availability. A subtle behavior is that while MariaDB is wire-compatible with MySQL, Azure treats them as separate services with distinct pricing tiers, version support, and feature sets (e.g., MariaDB supports the Aria storage engine and certain performance schema enhancements not in MySQL). In a real-world scenario, if a customer migrates from an on-premises MariaDB 10.3 instance to Azure, they must choose Azure Database for MariaDB rather than Azure Database for MySQL to ensure compatibility with MariaDB-specific features like the System Versioning for temporal tables.
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.
TExam Day Tips
→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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Database for MariaDB — Azure Database for MariaDB is the correct answer because it is the specific Azure service designed to provide a fully managed, enterprise-ready MariaDB database in the cloud. MariaDB is a community-developed fork of MySQL, and Azure offers a dedicated managed service for it, including built-in high availability, automated backups, and scaling, without requiring you to manage the underlying infrastructure.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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