The correct choice is to define a CloudFormation stack policy that denies updates to the database resource. A stack policy acts as a JSON-based access control document that explicitly prevents specified resources from being updated, replaced, or deleted during a stack update, even if the template itself calls for those changes. This is the only mechanism that directly blocks accidental replacement of critical resources like a database. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this concept tests your understanding of how to enforce guardrails during stack operations, often appearing in scenarios where change sets or drift detection are offered as distractors. A common trap is confusing change sets (which only preview changes) with stack policies (which enforce protection). Remember the mnemonic: “Policy protects, previews don’t prevent.”
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 manage its infrastructure. The SysOps Administrator needs to ensure that updates to a critical stack do not accidentally replace the database. Which feature should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Define a stack policy that denies updates to the database resource.
Option C is correct because a stack policy can protect specific resources from being updated or replaced during a stack update. Option A is wrong because change sets allow preview but do not prevent replacement. Option B is wrong because it does not prevent updates. Option D is wrong because drift detection identifies changes but does not prevent them.
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.
✗
Use drift detection to identify changes.
Why it's wrong here
Detects changes after they occur, does not prevent.
✗
Enable termination protection on the stack.
Why it's wrong here
Prevents deletion, not replacement during update.
✗
Use a change set to review the updates before executing them.
Why it's wrong here
Does not prevent replacement; only previews.
✓
Define a stack policy that denies updates to the database resource.
Why this is correct
Stack policies allow you to protect specific resources from updates.
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 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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 SOA-C02 NAT questions on configuration and troubleshooting.
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Define a stack policy that denies updates to the database resource. — Option C is correct because a stack policy can protect specific resources from being updated or replaced during a stack update. Option A is wrong because change sets allow preview but do not prevent replacement. Option B is wrong because it does not prevent updates. Option D is wrong because drift detection identifies changes but does not prevent them.
What should I do if I get this SOA-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 SOA-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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