- A
Enable encryption at rest with a customer-managed key, configure a firewall to allow the Machine Learning workspace's IP range, and grant data scientists access via storage account access keys.
Why wrong: Firewall rules are not as secure as private endpoints. Access keys should not be used; use Azure AD authentication.
- B
Enable encryption at rest with a service-managed key, configure a private endpoint, and grant data scientists access using Azure RBAC with the Storage Blob Data Reader role.
Why wrong: Service-managed keys do not meet the customer-managed key requirement.
- C
Enable encryption at rest with a customer-managed key, configure a private endpoint for the storage account, and grant the Machine Learning workspace and data scientists access using Azure RBAC with the Storage Blob Data Contributor role.
Private endpoint provides VNet isolation, RBAC provides fine-grained access, and CMK provides encryption control.
- D
Enable encryption at rest with a customer-managed key, configure a service endpoint for the storage account, and grant the Machine Learning workspace access using a SAS token.
Why wrong: Service endpoints are less secure than private endpoints. SAS tokens are less secure than managed identities.
Quick Answer
The correct answer is to enable encryption at rest with a customer-managed key, configure a private endpoint for the storage account, and grant the Azure Machine Learning workspace and data scientists access using Azure RBAC with the Storage Blob Data Contributor role. This configuration satisfies all three core requirements: customer-managed keys in Azure Key Vault provide tenant-controlled encryption, a private endpoint ensures the storage account is accessible only from your virtual network without exposing it to the public internet, and RBAC with the Storage Blob Data Contributor role enforces Azure AD authentication for granular access control. On the Microsoft Cybersecurity Architect exam, this scenario tests your ability to combine encryption, network isolation, and identity-based access for sensitive data—a common trap is choosing firewall rules instead of private endpoints, but remember that private endpoints offer deeper VNet integration and eliminate data exfiltration risks. Memory tip: think "CMK + PE + RBAC" as the three pillars of secure blob storage for machine learning workloads.
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. 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.
Trey Research, a biotech firm, is developing a machine learning model on Azure Machine Learning that uses sensitive genomic data. The data is stored in Azure Blob Storage. The company requires that all data be encrypted at rest using customer-managed keys stored in Azure Key Vault, and that access to the storage account be restricted to the Azure Machine Learning workspace and specific data scientists via Azure AD authentication. Additionally, the storage account must be accessible only from the company's virtual network. Which of the following configurations should you implement?
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
Enable encryption at rest with a customer-managed key, configure a private endpoint for the storage account, and grant the Machine Learning workspace and data scientists access using Azure RBAC with the Storage Blob Data Contributor role.
Option B is correct because it provides encryption at rest with CMK, private endpoint for VNet isolation, and RBAC for access control. Option A is wrong because firewall rules are less secure than private endpoints. Option C is wrong because SAS tokens are less secure than managed identities. Option D is wrong because service-managed keys do not meet the CMK requirement.
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.
- ✗
Enable encryption at rest with a customer-managed key, configure a firewall to allow the Machine Learning workspace's IP range, and grant data scientists access via storage account access keys.
- ✗
Enable encryption at rest with a service-managed key, configure a private endpoint, and grant data scientists access using Azure RBAC with the Storage Blob Data Reader role.
Why it's wrong here
Service-managed keys do not meet the customer-managed key requirement.
- ✓
Enable encryption at rest with a customer-managed key, configure a private endpoint for the storage account, and grant the Machine Learning workspace and data scientists access using Azure RBAC with the Storage Blob Data Contributor role.
Why this is correct
Private endpoint provides VNet isolation, RBAC provides fine-grained access, and CMK provides encryption control.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable encryption at rest with a customer-managed key, configure a service endpoint for the storage account, and grant the Machine Learning workspace access using a SAS token.
Why it's wrong here
Service endpoints are less secure than private endpoints. SAS tokens are less secure than managed identities.
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: Enable encryption at rest with a customer-managed key, configure a private endpoint for the storage account, and grant the Machine Learning workspace and data scientists access using Azure RBAC with the Storage Blob Data Contributor role. — Option B is correct because it provides encryption at rest with CMK, private endpoint for VNet isolation, and RBAC for access control. Option A is wrong because firewall rules are less secure than private endpoints. Option C is wrong because SAS tokens are less secure than managed identities. Option D is wrong because service-managed keys do not meet the CMK requirement.
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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