- A
Add a DependsOn attribute in the CloudFormation template to ensure the IAM role is created before the Lambda function.
DependsOn explicitly sets creation order.
- B
Create the IAM role in a separate CodeBuild action before the deploy stage.
Why wrong: This would be outside CloudFormation and add complexity.
- C
Add a wait condition in the CloudFormation template.
Why wrong: Wait conditions are for external signals, not internal dependencies.
- D
Separate the IAM role into a nested stack and reference it.
Why wrong: Nested stacks don't automatically resolve ordering issues.
Question 302 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 CodePipeline to deploy a serverless application. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild), and a deploy stage (CloudFormation). The deployment consistently fails because the Lambda function's IAM role is not created before the function. The team uses a single CloudFormation template. Which action should be taken to resolve this dependency issue?
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
✓
Add a DependsOn attribute in the CloudFormation template to ensure the IAM role is created before the Lambda function.
Option A is correct because the CloudFormation template lacks an explicit dependency between the IAM role resource and the Lambda function resource. By adding a `DependsOn` attribute to the Lambda function resource, you ensure CloudFormation creates the IAM role first, resolving the deployment failure. This is the standard way to handle resource creation order within a single CloudFormation template.
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.
- ✓
Add a DependsOn attribute in the CloudFormation template to ensure the IAM role is created before the Lambda function.
Why this is correct
DependsOn explicitly sets creation order.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create the IAM role in a separate CodeBuild action before the deploy stage.
Why it's wrong here
This would be outside CloudFormation and add complexity.
- ✗
Add a wait condition in the CloudFormation template.
Why it's wrong here
Wait conditions are for external signals, not internal dependencies.
- ✗
Separate the IAM role into a nested stack and reference it.
Why it's wrong here
Nested stacks don't automatically resolve ordering issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume CloudFormation automatically resolves all dependencies via intrinsic references, but when resources are referenced by name strings rather than logical IDs, explicit `DependsOn` is required to enforce creation order.
Detailed technical explanation
How to think about this question
CloudFormation uses intrinsic functions like `Ref` and `Fn::GetAtt` to automatically infer dependencies between resources. However, if a resource is referenced only by name (e.g., via a string parameter) rather than by its logical ID, CloudFormation cannot detect the dependency, and the `DependsOn` attribute becomes necessary. In real-world scenarios, this often occurs when IAM role names are passed as parameters or hardcoded, bypassing CloudFormation's automatic dependency detection.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a DependsOn attribute in the CloudFormation template to ensure the IAM role is created before the Lambda function. — Option A is correct because the CloudFormation template lacks an explicit dependency between the IAM role resource and the Lambda function resource. By adding a `DependsOn` attribute to the Lambda function resource, you ensure CloudFormation creates the IAM role first, resolving the deployment failure. This is the standard way to handle resource creation order within a single CloudFormation template.
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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Last reviewed: Jul 4, 2026
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