AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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 wants to migrate an on-premises SQL Server database to Azure. They require full administrative control over the database engine, including the ability to configure SQL Server Agent jobs and use cross-database queries. They also want to avoid patching the operating system. Which Azure service should they choose?
Why wrong: Azure SQL Database is a single database PaaS offering but lacks SQL Agent and cross-database query capabilities.
B
Azure SQL Managed Instance
Managed Instance offers full SQL Server engine capabilities with native virtual network support, SQL Agent, and cross-database queries, with no OS management.
C
SQL Server on Azure Virtual Machines
Why wrong: While it provides full control, it requires managing and patching the OS, which the customer wants to avoid.
D
Azure Database for SQL
Why wrong: There is no service named 'Azure Database for SQL'; Azure offers SQL Database, SQL Managed Instance, and SQL Server on VMs.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure SQL Managed Instance
Azure SQL Managed Instance is the correct choice because it provides near 100% compatibility with on-premises SQL Server, including full administrative control over the database engine, support for SQL Server Agent jobs, and cross-database queries. It also offloads OS patching to Microsoft, meeting the requirement to avoid OS maintenance.
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 SQL Database
Why it's wrong here
Azure SQL Database is a single database PaaS offering but lacks SQL Agent and cross-database query capabilities.
✓
Azure SQL Managed Instance
Why this is correct
Managed Instance offers full SQL Server engine capabilities with native virtual network support, SQL Agent, and cross-database queries, with no OS management.
Related concept
Read the scenario before looking for a memorised answer.
✗
SQL Server on Azure Virtual Machines
Why it's wrong here
While it provides full control, it requires managing and patching the OS, which the customer wants to avoid.
✗
Azure Database for SQL
Why it's wrong here
There is no service named 'Azure Database for SQL'; Azure offers SQL Database, SQL Managed Instance, and SQL Server on VMs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure SQL Database (PaaS) with Azure SQL Managed Instance, assuming both offer full administrative control, but Azure SQL Database restricts agent jobs and cross-database queries, while Managed Instance provides near-full compatibility.
Detailed technical explanation
How to think about this question
Azure SQL Managed Instance uses a virtual network (VNet) deployment model, enabling native virtual network integration and private IP addresses, which supports cross-database queries via linked servers and SQL Server Agent jobs through the same SQL Server Agent service. Under the hood, it runs on the same SQL Server engine as on-premises, with automated patching and backups handled by Azure, while still exposing the sysadmin role for granular control.
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 SQL Managed Instance — Azure SQL Managed Instance is the correct choice because it provides near 100% compatibility with on-premises SQL Server, including full administrative control over the database engine, support for SQL Server Agent jobs, and cross-database queries. It also offloads OS patching to Microsoft, meeting the requirement to avoid OS maintenance.
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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