SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and 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 three-tier web application. The template includes an EC2 instance, an RDS database, and an Application Load Balancer. The SysOps administrator wants to ensure that the database is not replaced during an update if the administrator accidentally changes a property that requires replacement. Which THREE actions should the administrator take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a custom resource backed by a Lambda function to manage the database.
The correct answers are A, C, and E. A is correct because a stack policy can prevent updates to critical resources. C is correct because DeletionPolicy: Retain preserves the database if the resource is deleted. E is correct because using a custom resource to manage the database allows more control. B is incorrect because enabling termination protection on the stack prevents stack deletion, not resource replacement. D is incorrect because the database should not be in a nested stack just for protection; it might be anyway.
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 a custom resource backed by a Lambda function to manage the database.
Why this is correct
Custom resources give you control over update behavior.
Related concept
Static NAT maps one inside address to one outside address.
✓
Set a DeletionPolicy attribute of 'Retain' on the RDS resource.
Why this is correct
Retain prevents deletion of the database if the resource is removed from template.
Related concept
Static NAT maps one inside address to one outside address.
✗
Place the RDS instance in a separate nested stack.
Why it's wrong here
Nested stacks do not inherently protect from replacement.
✗
Enable termination protection on the CloudFormation stack.
Why it's wrong here
Termination protection prevents stack deletion, not resource replacement.
✓
Apply a stack policy that denies update to the RDS instance.
Why this is correct
Stack policy can prevent modifications to the database resource.
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 SOA-C02 NAT questions on configuration and troubleshooting.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use a custom resource backed by a Lambda function to manage the database. — The correct answers are A, C, and E. A is correct because a stack policy can prevent updates to critical resources. C is correct because DeletionPolicy: Retain preserves the database if the resource is deleted. E is correct because using a custom resource to manage the database allows more control. B is incorrect because enabling termination protection on the stack prevents stack deletion, not resource replacement. D is incorrect because the database should not be in a nested stack just for protection; it might be anyway.
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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Question Discussion
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