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 service enables the creation of private endpoints so that Azure PaaS services like Storage and SQL Database are accessible only through a private IP within a VNet?
Why wrong: Service Endpoints extend VNet identity to the service but the service still has a public IP — traffic goes over optimized Microsoft routes but not fully private.
B
Azure Private Link with Private Endpoints
Private Link creates a private endpoint with a VNet private IP for PaaS services, keeping traffic entirely off the public internet.
C
Azure Firewall
Why wrong: Azure Firewall controls outbound traffic but doesn't create private IPs for PaaS services.
D
Network Security Groups
Why wrong: NSGs control inbound/outbound traffic for subnets and NICs but don't create private endpoints for PaaS services.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Private Link with Private Endpoints
Azure Private Link with Private Endpoints is the correct service because it enables you to access Azure PaaS services (e.g., Storage, SQL Database) over a private IP address within your Virtual Network (VNet). This ensures traffic never traverses the public internet, as the private endpoint uses a network interface with a private IP from your VNet, mapping the PaaS service to your VNet.
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.
✗
VNet Service Endpoints
Why it's wrong here
Service Endpoints extend VNet identity to the service but the service still has a public IP — traffic goes over optimized Microsoft routes but not fully private.
✓
Azure Private Link with Private Endpoints
Why this is correct
Private Link creates a private endpoint with a VNet private IP for PaaS services, keeping traffic entirely off the public internet.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Firewall
Why it's wrong here
Azure Firewall controls outbound traffic but doesn't create private IPs for PaaS services.
✗
Network Security Groups
Why it's wrong here
NSGs control inbound/outbound traffic for subnets and NICs but don't create private endpoints for PaaS services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VNet Service Endpoints with Private Endpoints, not realizing that Service Endpoints still use the service's public endpoint (though with source network identity), while Private Endpoints provide a true private IP address within the VNet.
Detailed technical explanation
How to think about this question
Under the hood, a Private Endpoint creates a network interface (NIC) in your VNet with a private IP from your subnet, which is then linked to the PaaS service via Azure Private Link. This uses a DNS configuration that resolves the service's fully qualified domain name (FQDN) to the private IP, ensuring traffic stays within the VNet and can be further secured with NSGs or firewall policies. A real-world scenario is a financial application that must meet compliance requirements by ensuring all data traffic to Azure SQL Database never leaves the Microsoft network boundary.
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
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 Private Link with Private Endpoints — Azure Private Link with Private Endpoints is the correct service because it enables you to access Azure PaaS services (e.g., Storage, SQL Database) over a private IP address within your Virtual Network (VNet). This ensures traffic never traverses the public internet, as the private endpoint uses a network interface with a private IP from your VNet, mapping the PaaS service to your VNet.
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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