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Question 228 of 1,750

Configuration Management and IaC →hardMultiple ChoiceObjective-mapped

DOP-C02 Configuration Management and IaC Practice Question

This DOP-C02 practice question tests your understanding of configuration management and iac. 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 is using AWS CodePipeline for CI/CD with CloudFormation as the deployment action. The pipeline fails intermittently with the error 'Rate exceeded' when creating or updating stacks. What is the most likely cause and solution?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
The stack has a stack policy that prevents updates; modify the stack policy.
Why wrong: Stack policies cause update failures, not rate errors.
B
The IAM role used by CloudFormation does not have sufficient permissions; update the role policy.
Why wrong: Permission issues cause access denied errors, not rate exceeded.
C
The CloudFormation API rate limit is being hit; request a limit increase from AWS Support.
Rate exceeded errors indicate API throttling; increasing the limit resolves it.
D
The pipeline is exceeding the CodePipeline execution frequency limit; reduce the number of pipeline executions.
Why wrong: CodePipeline does not have a rate limit that produces this error.

Full breakdown with real-world context →

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

✓

The CloudFormation API rate limit is being hit; request a limit increase from AWS Support.

The 'Rate exceeded' error is a standard AWS API throttling error, indicating that CloudFormation API requests are being made faster than the account-level or region-level rate limit allows. CodePipeline can trigger multiple concurrent stack operations, especially during parallel stage executions or frequent commits, which can exceed the default CloudFormation API rate limit (e.g., 0.5 requests per second per account per region for CreateStack/UpdateStack). Requesting a limit increase from AWS Support is the correct solution to accommodate higher throughput.

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.

✗
The stack has a stack policy that prevents updates; modify the stack policy.
Why it's wrong here
Stack policies cause update failures, not rate errors.
✗
The IAM role used by CloudFormation does not have sufficient permissions; update the role policy.
Why it's wrong here
Permission issues cause access denied errors, not rate exceeded.
✓
The CloudFormation API rate limit is being hit; request a limit increase from AWS Support.
Why this is correct
Rate exceeded errors indicate API throttling; increasing the limit resolves it.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The pipeline is exceeding the CodePipeline execution frequency limit; reduce the number of pipeline executions.
Why it's wrong here
CodePipeline does not have a rate limit that produces this error.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse API throttling errors with permission or policy issues, and they may incorrectly attribute the 'Rate exceeded' error to IAM roles or stack policies, rather than recognizing it as a classic AWS API rate limit error that requires a service quota increase.

Detailed technical explanation

How to think about this question

CloudFormation API throttling is governed by AWS's token bucket algorithm, with default limits such as 0.5 requests per second for CreateStack, UpdateStack, and DeleteStack operations per account per region. When CodePipeline triggers multiple stack operations in parallel (e.g., across multiple accounts or regions using cross-account actions), the combined request rate can exceed this limit, causing intermittent failures. Real-world scenarios often involve microservice architectures where frequent commits trigger multiple pipeline executions, each creating or updating stacks, leading to throttling even with moderate traffic.

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.

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.

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FAQ

Questions learners often ask

What does this DOP-C02 question test?

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: The CloudFormation API rate limit is being hit; request a limit increase from AWS Support. — The 'Rate exceeded' error is a standard AWS API throttling error, indicating that CloudFormation API requests are being made faster than the account-level or region-level rate limit allows. CodePipeline can trigger multiple concurrent stack operations, especially during parallel stage executions or frequent commits, which can exceed the default CloudFormation API rate limit (e.g., 0.5 requests per second per account per region for CreateStack/UpdateStack). Requesting a limit increase from AWS Support is the correct solution to accommodate higher throughput.

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.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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