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Question 897 of 1,740

Incident and Event Response →easyMultiple ChoiceObjective-mapped

DOP-C02 Incident and Event Response Practice Question

This DOP-C02 practice question tests your understanding of incident and event response. 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 CloudTrail to log API activity in their AWS account. The DevOps engineer needs to ensure that all management events are logged and that the logs are delivered to an S3 bucket in another account for centralized auditing. The engineer has already created an S3 bucket in the central auditing account and applied a bucket policy that grants the CloudTrail service permission to write logs. However, logs are not being delivered. The engineer verifies that the CloudTrail trail is configured to point to the correct S3 bucket name and that the bucket exists. What is the MOST likely reason the logs are not being delivered?

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.

Question 1easymultiple choice

Full question →

A
The S3 bucket policy in the central account does not include the 's3:PutObject' action for the CloudTrail service.
The bucket policy must explicitly allow the CloudTrail service to put objects; otherwise, the service cannot write.
B
The S3 bucket must have ACLs enabled to allow cross-account writes.
Why wrong: ACLs are not required; bucket policies are sufficient and recommended.
C
The source account does not have a VPC peering connection to the central auditing account.
Why wrong: CloudTrail delivery does not require VPC peering; it uses S3's public endpoint.
D
The CloudTrail trail must be created in the central auditing account, not the source account.
Why wrong: Trails can be created in the source account and deliver logs to a bucket in another account.

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 S3 bucket policy in the central account does not include the 's3:PutObject' action for the CloudTrail service.

Option B is correct because the S3 bucket policy must also grant the CloudTrail service the 's3:PutObject' permission for the bucket, not just allow write access generically. Option A is wrong because CloudTrail can deliver logs cross-account without a VPC peering connection. Option C is wrong because the bucket policy should be on the destination bucket, not the source account. Option D is wrong because the bucket is in another account, so the source account cannot set ACLs; bucket policy is the correct mechanism.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

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 S3 bucket policy in the central account does not include the 's3:PutObject' action for the CloudTrail service.
Why this is correct
The bucket policy must explicitly allow the CloudTrail service to put objects; otherwise, the service cannot write.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The S3 bucket must have ACLs enabled to allow cross-account writes.
Why it's wrong here
ACLs are not required; bucket policies are sufficient and recommended.
✗
The source account does not have a VPC peering connection to the central auditing account.
Why it's wrong here
CloudTrail delivery does not require VPC peering; it uses S3's public endpoint.
✗
The CloudTrail trail must be created in the central auditing account, not the source account.
Why it's wrong here
Trails can be created in the source account and deliver logs to a bucket in another account.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

Identify inside and outside interfaces first.
Check whether the scenario needs static NAT, dynamic NAT or PAT.
Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

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.

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this DOP-C02 question test?

Incident and Event Response — This question tests Incident and Event Response — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: The S3 bucket policy in the central account does not include the 's3:PutObject' action for the CloudTrail service. — Option B is correct because the S3 bucket policy must also grant the CloudTrail service the 's3:PutObject' permission for the bucket, not just allow write access generically. Option A is wrong because CloudTrail can deliver logs cross-account without a VPC peering connection. Option C is wrong because the bucket policy should be on the destination bucket, not the source account. Option D is wrong because the bucket is in another account, so the source account cannot set ACLs; bucket policy is the correct mechanism.

What should I do if I get this DOP-C02 question wrong?

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?

Static NAT maps one inside address to one outside address.

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