← DOP-C02·Amazon Web Services

Question 455 of 1,750

SDLC Automation →mediumMultiple ChoiceObjective-mapped

Protecting Critical Resources with CloudFormation Stack Policies — Prevent Accidental Updates

This DOP-C02 practice question tests your understanding of sdlc 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 manage infrastructure. They want to update a stack but need to ensure that critical database resources are not accidentally replaced during the update. What is the BEST way to protect these resources?

Clue words in this question

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

Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

A
Use a CreationPolicy on the database resources.
Why wrong: CreationPolicy only waits for signals during creation, not protection from updates.
B
Use a DeletionPolicy of Retain on the database resources.
Why wrong: DeletionPolicy only protects against stack deletion, not update replacement.
C
Define a stack policy that denies updates to the database resources.
Stack policies control update permissions; a Deny on replace prevents replacement.
D
Set an UpdatePolicy with AutoScalingReplacingUpdate.
Why wrong: UpdatePolicy is for Auto Scaling groups, not for general resource protection.

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

✓

Define a stack policy that denies updates to the database resources.

Option C is correct because a stack policy explicitly defines which resources can be updated or replaced during a stack update. By applying a stack policy that denies update actions on the critical database resources, you prevent accidental replacement or modification without having to remove the resources from the stack. This is the most direct and robust method to protect specific resources during a CloudFormation update operation.

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.

✗
Use a CreationPolicy on the database resources.
Why it's wrong here
CreationPolicy only waits for signals during creation, not protection from updates.
✗
Use a DeletionPolicy of Retain on the database resources.
Why it's wrong here
DeletionPolicy only protects against stack deletion, not update replacement.
✓
Define a stack policy that denies updates to the database resources.
Why this is correct
Stack policies control update permissions; a Deny on replace prevents replacement.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set an UpdatePolicy with AutoScalingReplacingUpdate.
Why it's wrong here
UpdatePolicy is for Auto Scaling groups, not for general resource protection.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse DeletionPolicy (which only applies on stack deletion) with stack policies (which control update behavior), leading them to incorrectly select Option B as a safeguard during updates.

Detailed technical explanation

How to think about this question

A stack policy is a JSON document that defines the allowed update actions (e.g., Update:Modify, Update:Replace, Update:Delete) on specific resources or resource types. When a stack update is initiated, CloudFormation evaluates the stack policy and denies any action that is not explicitly allowed, effectively preventing the replacement of critical resources like RDS databases. This is especially important in production environments where an unintended replacement could cause data loss or extended downtime.

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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

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?

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: Define a stack policy that denies updates to the database resources. — Option C is correct because a stack policy explicitly defines which resources can be updated or replaced during a stack update. By applying a stack policy that denies update actions on the critical database resources, you prevent accidental replacement or modification without having to remove the resources from the stack. This is the most direct and robust method to protect specific resources during a CloudFormation update operation.

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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.