The correct answer is to enable termination protection on the stack, set a DeletionPolicy of Retain on the RDS instance, and apply a StackPolicy to protect resources from updates. Termination protection prevents accidental deletion of the CloudFormation stack entirely by blocking delete requests, while the DeletionPolicy of Retain ensures critical resources like databases survive the stack’s removal. A StackPolicy adds an extra layer of defense by denying updates to specified resources, which is distinct from deletion prevention. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between safeguards: termination protection stops stack deletion, DeletionPolicy controls resource fate after deletion, and StackPolicy governs updates—not deletion. A common trap is confusing StackPolicy with deletion prevention, but remember: StackPolicy blocks updates, not deletes. Memory tip: “Terminate the stack, Retain the DB, and Policy the updates.”
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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 uses AWS CloudFormation to deploy a multi-tier application. The engineer wants to ensure that the stack is not accidentally deleted and that critical resources like databases are retained even if the stack is deleted. Which THREE steps should the engineer take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a StackPolicy that denies updates to the RDS instance
Options A, C, and D are correct. Option A: Enable termination protection to prevent stack deletion. Option C: Set DeletionPolicy to Retain on the RDS instance so it is not deleted. Option D: Use a StackPolicy to protect resources from updates. Option B is incorrect because stack policy does not prevent deletion. Option E is incorrect because nested stacks do not provide protection.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 StackPolicy that denies updates to the RDS instance
Why this is correct
Protects the database from accidental updates.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use nested stacks to isolate the database
Why it's wrong here
Nested stacks do not prevent deletion.
✗
Use a StackPolicy to deny delete actions
Why it's wrong here
StackPolicy does not prevent deletion.
✓
Set the DeletionPolicy attribute to Retain on the RDS instance
Why this is correct
Retain preserves the resource after stack deletion.
Related concept
Static NAT maps one inside address to one outside address.
✓
Enable termination protection on the stack
Why this is correct
Termination protection prevents stack deletion.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
SDLC Automation — This question tests SDLC Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a StackPolicy that denies updates to the RDS instance — Options A, C, and D are correct. Option A: Enable termination protection to prevent stack deletion. Option C: Set DeletionPolicy to Retain on the RDS instance so it is not deleted. Option D: Use a StackPolicy to protect resources from updates. Option B is incorrect because stack policy does not prevent deletion. Option E is incorrect because nested stacks do not provide protection.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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