- A
Create a service principal and store its secret in Azure Key Vault; use the Key Vault Secrets Store CSI driver to mount it.
Why wrong: This still involves a secret, albeit stored in Key Vault; requirement says no secrets stored in cluster.
- B
Enable a system-assigned managed identity on the AKS cluster nodes and have pods use it.
Why wrong: Node-level identity is shared, not per microservice; violates principle of least privilege.
- C
Use Azure AD Workload Identity for each pod to authenticate to Azure SQL Database using managed identities.
Workload Identity assigns an Azure AD identity to each pod, enabling secure authentication without secrets.
- D
Store the Azure SQL connection string with credentials in a Kubernetes secret.
Why wrong: Kubernetes secrets are base64-encoded, not secure, and violate the requirement.
Quick Answer
The answer is to use Azure AD Workload Identity for each pod to authenticate to Azure SQL Database. This is correct because Azure AD Workload Identity allows each microservice pod to assume its own Azure AD identity through a federated token exchange, enabling direct authentication to Azure SQL without storing any service principal secrets or certificates in the cluster. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of secretless authentication patterns and the principle of least privilege at the pod level—a common trap is confusing node-level managed identities with pod-level identities, or assuming that Key Vault integration eliminates secret storage entirely when it still requires a secret to access the vault. Remember the key distinction: Workload Identity gives each pod its own identity, not the node, and eliminates the need for any stored credentials. A useful memory tip is "Pod identity, no secret—SQL access, direct."
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and data. 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 company is designing a microservices architecture on Azure Kubernetes Service (AKS). Each microservice needs to authenticate to Azure SQL Database using its own identity. The security team requires that no service principal secrets or certificates be stored in the cluster. What should you implement to authenticate the microservices to Azure SQL Database?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use Azure AD Workload Identity for each pod to authenticate to Azure SQL Database using managed identities.
Azure AD Workload Identity (formerly AAD Pod Identity) allows pods to assume an Azure AD identity and authenticate to Azure resources without secrets. This integrates with Azure SQL's Azure AD authentication. Option A is the correct approach. Service Principal with Key Vault still stores a secret. Managed identity at the node level is too broad. Storage of client secrets is not allowed.
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.
- ✗
Create a service principal and store its secret in Azure Key Vault; use the Key Vault Secrets Store CSI driver to mount it.
Why it's wrong here
This still involves a secret, albeit stored in Key Vault; requirement says no secrets stored in cluster.
- ✗
Enable a system-assigned managed identity on the AKS cluster nodes and have pods use it.
Why it's wrong here
Node-level identity is shared, not per microservice; violates principle of least privilege.
- ✓
Use Azure AD Workload Identity for each pod to authenticate to Azure SQL Database using managed identities.
Why this is correct
Workload Identity assigns an Azure AD identity to each pod, enabling secure authentication without secrets.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the Azure SQL connection string with credentials in a Kubernetes secret.
Why it's wrong here
Kubernetes secrets are base64-encoded, not secure, and violate the requirement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
What to study next
Got this wrong? Here's your next step.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Design security solutions for applications and data — study guide chapter
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FAQ
Questions learners often ask
What does this SC-100 question test?
Design security solutions for applications and data — This question tests Design security solutions for applications and data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Azure AD Workload Identity for each pod to authenticate to Azure SQL Database using managed identities. — Azure AD Workload Identity (formerly AAD Pod Identity) allows pods to assume an Azure AD identity and authenticate to Azure resources without secrets. This integrates with Azure SQL's Azure AD authentication. Option A is the correct approach. Service Principal with Key Vault still stores a secret. Managed identity at the node level is too broad. Storage of client secrets is not allowed.
What should I do if I get this SC-100 question wrong?
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 21, 2026
This SC-100 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-100 exam.
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