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Question 644 of 1,750

Configuration Management and IaC →mediumMultiple 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.

An organization uses OpsWorks to manage application stacks. They notice that custom cookbooks are not being executed during the lifecycle events. What is the most likely cause?

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 layer's IAM role does not have permissions to execute the cookbook
Why wrong: IAM roles are for AWS API calls; cookbook execution does not require IAM permissions.
B
The custom cookbook repository URL is misconfigured or inaccessible
If OpsWorks cannot fetch the cookbook from the repository, it will not execute the recipes.
C
The cookbook is not configured with CodeDeploy
Why wrong: CodeDeploy is separate from OpsWorks cookbook execution.
D
The cookbook uses a Chef version that is not supported by OpsWorks
Why wrong: OpsWorks supports multiple Chef versions; version mismatch would cause errors, not silent non-execution.

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 custom cookbook repository URL is misconfigured or inaccessible

Custom cookbooks in AWS OpsWorks are fetched from a repository (e.g., Git, S3, HTTP) during lifecycle events. If the repository URL is misconfigured (e.g., wrong branch, invalid path) or inaccessible (e.g., private repo without proper SSH keys or S3 bucket permissions), OpsWorks cannot retrieve the cookbooks, causing them to not execute. This is the most common cause of cookbook execution failures.

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 layer's IAM role does not have permissions to execute the cookbook
Why it's wrong here
IAM roles are for AWS API calls; cookbook execution does not require IAM permissions.
✓
The custom cookbook repository URL is misconfigured or inaccessible
Why this is correct
If OpsWorks cannot fetch the cookbook from the repository, it will not execute the recipes.
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 cookbook is not configured with CodeDeploy
Why it's wrong here
CodeDeploy is separate from OpsWorks cookbook execution.
✗
The cookbook uses a Chef version that is not supported by OpsWorks
Why it's wrong here
OpsWorks supports multiple Chef versions; version mismatch would cause errors, not silent non-execution.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse IAM permissions with repository access, assuming the layer's IAM role controls cookbook retrieval, when in fact OpsWorks uses separate SSH keys or S3 bucket policies for repository access.

Detailed technical explanation

How to think about this question

OpsWorks uses the `opsworks-agent` to download custom cookbooks from the configured repository at the start of each lifecycle event (Setup, Configure, Deploy, Undeploy, Shutdown). The agent clones the repository using the provided URL, branch, and revision; if the URL is invalid or the repository is unreachable (e.g., SSH key mismatch, S3 bucket policy denies access), the agent logs a `git clone` or `wget` failure and skips the cookbook execution entirely. This is distinct from a Chef syntax error, which would cause a Chef run failure but still attempt execution.

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 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.

Quick reference

AWS S3 Storage Class Comparison

Storage Class	Min Duration	Retrieval	Use Case
S3 Standard	None	Immediate	Frequently accessed data
S3 Standard-IA	30 days	Immediate	Infrequent access, rapid retrieval
S3 One Zone-IA	30 days	Immediate	Non-critical infrequent data
S3 Intelligent-Tiering	None	Immediate–hours	Unknown or changing access patterns
S3 Glacier Instant	90 days	Milliseconds	Archive with instant retrieval
S3 Glacier Flexible	90 days	Minutes–hours	Archive, flexible retrieval
S3 Glacier Deep Archive	180 days	Hours	Long-term compliance archive

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 custom cookbook repository URL is misconfigured or inaccessible — Custom cookbooks in AWS OpsWorks are fetched from a repository (e.g., Git, S3, HTTP) during lifecycle events. If the repository URL is misconfigured (e.g., wrong branch, invalid path) or inaccessible (e.g., private repo without proper SSH keys or S3 bucket permissions), OpsWorks cannot retrieve the cookbooks, causing them to not execute. This is the most common cause of cookbook execution failures.

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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