SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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. A key principle to apply: sCPs are guardrails that define the maximum available permissions for accounts.. 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 claims portal must ensure that only encrypted EBS volumes can be created in the account. What is the strongest preventive control? The design must avoid adding custom operational scripts.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an SCP that denies ec2:CreateVolume when the encrypted condition is false
Option C is correct because an SCP (Service Control Policy) at the AWS Organizations level can deny the ec2:CreateVolume API call when the encryption condition (aws:RequestTag/Encrypted or ec2:Encrypted) is false. This is a preventive control that blocks the creation of unencrypted volumes before they exist, and it requires no custom operational scripts, aligning with the design constraint.
Key principle: SCPs are guardrails that define the maximum available permissions for accounts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Tag encrypted volumes after creation
Why it's wrong here
Tags identify resources but do not enforce encryption.
✗
Enable VPC Flow Logs
Why it's wrong here
Flow Logs monitor network traffic and do not control EBS encryption.
✓
Use an SCP that denies ec2:CreateVolume when the encrypted condition is false
Why this is correct
An SCP can prevent noncompliant volume creation across accounts in an organization.
Related concept
SCPs are guardrails that define the maximum available permissions for accounts.
✗
Run a daily Lambda function to encrypt unencrypted volumes
Why it's wrong here
Reactive remediation leaves a window of exposure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse detective or corrective controls (like tagging or Lambda remediation) with preventive controls, or they mistakenly think VPC Flow Logs can enforce encryption policies.
Detailed technical explanation
How to think about this question
SCPs are evaluated before the IAM principal's permissions and can use condition keys like ec2:Encrypted (a boolean condition key) to deny actions. The SCP would use a Deny effect with a condition block such as 'BoolIfExists': {'ec2:Encrypted': 'false'} to block creation of unencrypted volumes. Note that the condition key ec2:Encrypted is only present when the volume is created with encryption specified; if the key is absent (e.g., default encryption is enabled), the 'BoolIfExists' modifier ensures the policy does not inadvertently block valid requests.
KKey Concepts to Remember
SCPs are guardrails that define the maximum available permissions for accounts.
SCPs are applied at the OU or organization root level in AWS Organizations.
SCPs use JSON policy syntax similar to IAM policies but only support 'Deny' statements.
SCPs can prevent specific API actions based on conditions, like resource encryption status.
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
SCPs are guardrails that define the maximum available permissions for accounts.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Review sCPs are guardrails that define the maximum available permissions for accounts., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design Secure Architectures — This question tests Design Secure Architectures — SCPs are guardrails that define the maximum available permissions for accounts..
What is the correct answer to this question?
The correct answer is: Use an SCP that denies ec2:CreateVolume when the encrypted condition is false — Option C is correct because an SCP (Service Control Policy) at the AWS Organizations level can deny the ec2:CreateVolume API call when the encryption condition (aws:RequestTag/Encrypted or ec2:Encrypted) is false. This is a preventive control that blocks the creation of unencrypted volumes before they exist, and it requires no custom operational scripts, aligning with the design constraint.
What should I do if I get this SAA-C03 question wrong?
Review sCPs are guardrails that define the maximum available permissions for accounts., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
SCPs are guardrails that define the maximum available permissions for accounts.
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Question Discussion
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