- A
Use the 'NoEcho' property on the password parameter.
Why wrong: NoEcho hides input but the value may still be in template.
- B
Store the password in the template outputs.
Why wrong: Outputs are visible to anyone with access.
- C
Hardcode the password in the template and use the 'NoEcho' property.
Why wrong: Hardcoding is not secure even with NoEcho.
- D
Use a dynamic reference to a Systems Manager Parameter Store parameter.
Dynamic references retrieve secrets securely.
Question 1,219 of 1,748
Avoid Exposing Sensitive Data in CloudFormation Templates: Use Dynamic References to AWS Systems Manager Parameter Store
This SCS-C02 practice question tests your understanding of infrastructure security. 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 using AWS CloudFormation to deploy infrastructure. Which method ensures that sensitive data, such as database passwords, is not exposed in the template or outputs?
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 a dynamic reference to a Systems Manager Parameter Store parameter.
Option D is correct because using a dynamic reference to an AWS Systems Manager Parameter Store parameter allows CloudFormation to retrieve the password at stack creation time without embedding it in the template or exposing it in outputs. The password is stored securely in Parameter Store, and CloudFormation resolves the reference dynamically, ensuring the sensitive value never appears in plaintext in the template, stack events, or outputs.
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.
- ✗
Use the 'NoEcho' property on the password parameter.
Why it's wrong here
NoEcho hides input but the value may still be in template.
- ✗
Store the password in the template outputs.
Why it's wrong here
Outputs are visible to anyone with access.
- ✗
Hardcode the password in the template and use the 'NoEcho' property.
Why it's wrong here
Hardcoding is not secure even with NoEcho.
- ✓
Use a dynamic reference to a Systems Manager Parameter Store parameter.
Why this is correct
Dynamic references retrieve secrets securely.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the 'NoEcho' property with a security control that protects the value from being exposed anywhere, when in reality it only hides the input during parameter entry and does not prevent exposure in the template file, outputs, or logs.
Trap categories for this question
Command / output trap
Outputs are visible to anyone with access.
Detailed technical explanation
How to think about this question
Under the hood, CloudFormation dynamic references (using the 'resolve:ssm:' or 'resolve:ssm-secure:' syntax) instruct the CloudFormation service to call the AWS Systems Manager GetParameter API during stack operations, retrieving the parameter value and injecting it into the resource property at runtime. The resolved value is never stored in the template or in the CloudFormation state; it is only used transiently by the resource creation. A subtle behavior is that if you use 'resolve:ssm-secure:', CloudFormation marks the resolved value as sensitive and does not log it in stack events, whereas a standard SSM parameter reference might still appear in logs if not handled carefully.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a dynamic reference to a Systems Manager Parameter Store parameter. — Option D is correct because using a dynamic reference to an AWS Systems Manager Parameter Store parameter allows CloudFormation to retrieve the password at stack creation time without embedding it in the template or exposing it in outputs. The password is stored securely in Parameter Store, and CloudFormation resolves the reference dynamically, ensuring the sensitive value never appears in plaintext in the template, stack events, or outputs.
What should I do if I get this SCS-C02 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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Last reviewed: Jul 4, 2026
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