Quick Answer
The answer is Azure SQL Database. This is the correct choice because it is a fully managed Platform-as-a-Service (PaaS) offering that provides built-in high availability without requiring any configuration from the user, automatically handling failover and maintaining a 99.99% SLA through features like zone-redundant configurations and automatic failover groups. On the Microsoft Azure Data Fundamentals DP-900 exam, this question tests your understanding of the key difference between PaaS and IaaS database services—specifically, that Azure SQL Database abstracts away all high-availability management, whereas Azure Virtual Machines or SQL Managed Instance may require manual setup. A common trap is confusing Azure SQL Database with Azure SQL Managed Instance, but remember: Managed Instance offers more SQL Server compatibility features but still requires some configuration for high availability, while Azure SQL Database is truly hands-off. Memory tip: think "PaaS = Plug and Play High Availability."
This DP-900 practice question tests your understanding of identify considerations for relational data on azure. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A company needs to create a relational database in Azure that is compatible with existing SQL Server applications and provides built-in high availability without requiring configuration. Which service should they choose?
SQL Server on Azure Virtual Machines
Why wrong: Requires manual setup of high availability.
Azure Database for MariaDB
Why wrong: Different database engine, not SQL Server compatible.
Azure Cosmos DB
Why wrong: NoSQL, not SQL Server compatible.
Azure SQL Database
PaaS with built-in high availability and SQL Server compatibility.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure SQL Database
Azure SQL Database is a fully managed Platform-as-a-Service (PaaS) relational database that is built on the latest stable version of the Microsoft SQL Server engine, ensuring compatibility with existing SQL Server applications. It provides built-in high availability with a 99.99% SLA through automatic failover groups and zone-redundant configurations, requiring no manual setup or configuration from the user.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
SQL Server on Azure Virtual Machines
Why it's wrong here
Requires manual setup of high availability.
Azure Database for MariaDB
Why it's wrong here
Different database engine, not SQL Server compatible.
Azure Cosmos DB
Why it's wrong here
NoSQL, not SQL Server compatible.
Azure SQL Database
Why this is correct
PaaS with built-in high availability and SQL Server compatibility.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse IaaS (SQL Server on VMs) with PaaS (Azure SQL Database) and assume both require manual HA setup, or they mistakenly think MariaDB or Cosmos DB can be used as drop-in replacements for SQL Server applications.
Detailed technical explanation
Azure SQL Database uses a quorum-based commit model and automatic page repair to maintain high availability across three replicas within the same or different availability zones, transparent to the application. Under the hood, it leverages SQL Server's HADR (High Availability and Disaster Recovery) technology but abstracts all configuration, so even if a primary replica fails, the service automatically fails over to a secondary replica with no data loss (if using Premium or Business Critical tiers) and typically under 10 seconds of downtime.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Identify considerations for relational data on Azure — This question tests Identify considerations for relational data on Azure — Read the scenario before looking for a memorised answer..
The correct answer is: Azure SQL Database — Azure SQL Database is a fully managed Platform-as-a-Service (PaaS) relational database that is built on the latest stable version of the Microsoft SQL Server engine, ensuring compatibility with existing SQL Server applications. It provides built-in high availability with a 99.99% SLA through automatic failover groups and zone-redundant configurations, requiring no manual setup or configuration from the user.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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