Quick Answer
The answer is Azure SQL Database. This is the correct choice because Azure SQL Database is a fully managed relational database PaaS that handles high availability and automatic backups as built-in features, not as tasks you must configure yourself. Unlike IaaS options where you manage the virtual machine, SQL Server installation, and failover clusters, Azure SQL Database provides a 99.99% SLA for uptime and point-in-time restore from automatic backups, allowing the startup to scale elastically as data volume grows without administrative overhead. On the DP-900 exam, this question tests your ability to distinguish between PaaS and IaaS responsibilities: a common trap is choosing an IaaS option like SQL Server on a VM, thinking you need more control, but the key phrase “fully managed” always points to PaaS. Remember the mnemonic “PaaS for Peace of Mind” — if the question emphasizes minimal management, built-in HA, and automatic backups, the answer is Azure SQL Database.
This DP-900 practice question tests your understanding of identify considerations for relational data on azure. 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.
A startup is building a new application and expects rapid growth in data volume. They want a fully managed relational database service with built-in high availability and automatic backups. Which Azure service should they choose?
SQL Server on Azure Virtual Machines
Why wrong: This is IaaS, requiring more management.
Azure Database for MySQL
Why wrong: Azure Database for MySQL is fully managed but MySQL-specific; Azure SQL Database is more general.
Azure SQL Database
Azure SQL Database is a fully managed PaaS offering.
Azure Cosmos DB
Why wrong: Cosmos DB is NoSQL, not relational.
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 provides built-in high availability with a 99.99% SLA and automatic backups with point-in-time restore. It meets the startup's need for rapid growth by offering elastic scaling and minimal administrative overhead, unlike Infrastructure-as-a-Service (IaaS) options.
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
This is IaaS, requiring more management.
Azure Database for MySQL
Why it's wrong here
Azure Database for MySQL is fully managed but MySQL-specific; Azure SQL Database is more general.
Azure SQL Database
Why this is correct
Azure SQL Database is a fully managed PaaS offering.
Related concept
Read the scenario before looking for a memorised answer.
Azure Cosmos DB
Why it's wrong here
Cosmos DB is NoSQL, not relational.
Common exam traps
The trap here is that candidates often confuse 'fully managed' with 'IaaS' (Option A) or pick a specific database engine (Option B) without recognizing that Azure SQL Database is the default PaaS relational service that satisfies all stated requirements.
Detailed technical explanation
Azure SQL Database uses a quorum-based commit model and automatic page replication across three replicas within the same region to achieve high availability without manual failover clustering. Automatic backups are retained for 7 to 35 days (configurable) and support point-in-time restore to any second within the retention window, which is critical for startups needing to recover from data corruption or user errors during rapid growth.
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 provides built-in high availability with a 99.99% SLA and automatic backups with point-in-time restore. It meets the startup's need for rapid growth by offering elastic scaling and minimal administrative overhead, unlike Infrastructure-as-a-Service (IaaS) options.
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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