AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is designing private access to a PaaS database from workloads in a VNet. The database should not be reachable over its public endpoint. What should be recommended?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Private Endpoint with public network access disabled
Private Endpoint with public network access disabled is the correct recommendation because it assigns a private IP address from the VNet to the PaaS database, making it accessible only over the private network. This eliminates exposure to the public internet by disabling the public endpoint, aligning with the requirement that the database should not be reachable over its public endpoint.
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.
✗
A public IP address with NSG rules
Why it's wrong here
PaaS resources are not secured through VM NSGs in that way and public exposure remains.
✗
A route table to the internet gateway
Why it's wrong here
Azure does not use internet gateways and routing does not privatize PaaS endpoints.
✓
Private Endpoint with public network access disabled
Why this is correct
Private Endpoint exposes the PaaS resource through a private IP in the VNet and can be combined with disabling public access.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure CDN endpoint
Why it's wrong here
CDN does not provide private database connectivity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Private Endpoint with Service Endpoint, but Service Endpoint does not remove the public endpoint and still allows internet-based access if the firewall permits it, whereas Private Endpoint with public access disabled fully isolates the resource.
Detailed technical explanation
How to think about this question
Azure Private Endpoint uses a network interface with a private IP from the VNet, leveraging Azure Private Link to securely connect to PaaS services like Azure SQL Database or Cosmos DB. When public network access is disabled, the service's firewall rejects all traffic from public IPs, ensuring only traffic via the private endpoint is accepted. This setup also supports DNS resolution via Azure Private DNS Zones, allowing workloads to resolve the database's FQDN to the private IP automatically.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Private Endpoint with public network access disabled — Private Endpoint with public network access disabled is the correct recommendation because it assigns a private IP address from the VNet to the PaaS database, making it accessible only over the private network. This eliminates exposure to the public internet by disabling the public endpoint, aligning with the requirement that the database should not be reachable over its public endpoint.
What should I do if I get this AZ-305 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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