DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 DevOps team wants to implement drift detection to identify resources that have been modified outside of CloudFormation. Which TWO of the following are correct statements about CloudFormation drift detection?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Drift detection can detect changes to resources such as security groups.
Drift detection can detect changes to resources such as security groups because CloudFormation supports drift detection for a wide range of AWS resources, including EC2 security groups. When drift detection is performed, CloudFormation compares the current configuration of each supported resource in the stack with the expected configuration defined in the stack template. If a security group rule is added or removed outside of CloudFormation (e.g., via the AWS Console or CLI), drift detection will report that resource as drifted.
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.
✗
Drift detection is automatically performed every time the stack is updated.
Why it's wrong here
Drift detection is not automatic; it must be explicitly initiated.
✗
Drift detection can be performed on nested stacks independently.
Why it's wrong here
Drift detection must be performed on the root stack; nested stacks are checked as part of the root stack.
✗
Drift detection automatically reverts any changes to the original template.
Why it's wrong here
Drift detection only identifies changes, does not remediate.
✓
Drift detection can detect changes to resources such as security groups.
Why this is correct
Drift detection works on supported resources like security groups.
Related concept
Read the scenario before looking for a memorised answer.
✓
Drift detection can be performed on a stack at any time.
Why this is correct
Drift detection can be manually initiated on any stack.
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 assume drift detection is automatic or can fix drift, but AWS explicitly requires manual initiation and only provides detection, not remediation.
Detailed technical explanation
How to think about this question
Under the hood, CloudFormation drift detection works by calling the underlying service APIs (e.g., EC2 DescribeSecurityGroups) to fetch the current state of each resource and then comparing it against the resource properties defined in the stack template. A subtle behavior is that not all resources are supported for drift detection; for example, custom resources and certain AWS Lambda-backed resources are not checked. In a real-world scenario, if a security group is modified by an automated script that bypasses CloudFormation, drift detection will flag it, allowing the team to decide whether to update the template or revert the change manually.
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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Drift detection can detect changes to resources such as security groups. — Drift detection can detect changes to resources such as security groups because CloudFormation supports drift detection for a wide range of AWS resources, including EC2 security groups. When drift detection is performed, CloudFormation compares the current configuration of each supported resource in the stack with the expected configuration defined in the stack template. If a security group rule is added or removed outside of CloudFormation (e.g., via the AWS Console or CLI), drift detection will report that resource as drifted.
What should I do if I get this DOP-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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Question Discussion
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