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Management and Security Governance →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is to revert the bucket policy to remove the public access. This is the correct first mitigation step because the CloudTrail event shows the root user executed an s3:PutBucketPolicy action that granted public read access, typically by setting Principal to "*" with an Allow effect on s3:GetObject. Reverting that policy immediately revokes the unauthorized public exposure, stopping data leakage before any further investigation. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your ability to prioritize containment over analysis—a common trap is to first disable the root user or rotate keys, but the root user’s action is already done, and the immediate threat is the open bucket. Remember the incident response mantra: "Stop the bleed first." For a memory tip, think "Root wrote it, revert it"—the root user’s policy change is the incident, and reversing that policy is the fastest way to close the public access hole.

SCS-C02 Management and Security Governance Practice Question

This SCS-C02 practice question tests your understanding of management and security governance. 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.

Exhibit

Refer to the exhibit.

[CloudTrail event snippet]
{
  "eventVersion": "1.08",
  "userIdentity": {
    "type": "Root",
    "arn": "arn:aws:iam::123456789012:root",
    "accountId": "123456789012"
  },
  "eventTime": "2024-03-15T12:34:56Z",
  "eventSource": "s3.amazonaws.com",
  "eventName": "PutBucketPolicy",
  "awsRegion": "us-east-1",
  "sourceIPAddress": "203.0.113.5",
  "userAgent": "[S3Console/1.0]",
  "requestParameters": {
    "bucketName": "my-critical-bucket",
    "bucketPolicy": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Principal": "*",
          "Action": "s3:GetObject",
          "Resource": "arn:aws:s3:::my-critical-bucket/*"
        }
      ]
    }
  },
  "responseElements": null
}

A security engineer reviews the above CloudTrail event. Which action should the engineer take FIRST to mitigate a potential security issue?

Clue words in this question

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

  • Clue: "first"

    Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

Question 1mediummultiple choice
Full question →

Exhibit

Refer to the exhibit.

[CloudTrail event snippet]
{
  "eventVersion": "1.08",
  "userIdentity": {
    "type": "Root",
    "arn": "arn:aws:iam::123456789012:root",
    "accountId": "123456789012"
  },
  "eventTime": "2024-03-15T12:34:56Z",
  "eventSource": "s3.amazonaws.com",
  "eventName": "PutBucketPolicy",
  "awsRegion": "us-east-1",
  "sourceIPAddress": "203.0.113.5",
  "userAgent": "[S3Console/1.0]",
  "requestParameters": {
    "bucketName": "my-critical-bucket",
    "bucketPolicy": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Principal": "*",
          "Action": "s3:GetObject",
          "Resource": "arn:aws:s3:::my-critical-bucket/*"
        }
      ]
    }
  },
  "responseElements": null
}

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

✓

Revert the bucket policy to remove the public access.

The CloudTrail event shows that the root user executed `s3:PutBucketPolicy` to apply a bucket policy that grants public access (e.g., `Principal: "*"` or `Effect: "Allow"` with `Action: "s3:GetObject"`). Reverting the bucket policy to remove public access is the immediate corrective action to stop unauthorized data exposure. This directly addresses the security issue by revoking the public read permissions that were just granted.

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.

  • ✓

    Revert the bucket policy to remove the public access.

    Why this is correct

    The bucket is now publicly readable; immediate remediation is needed.

    Clue confirmation

    The clue word "first" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Delete the bucket to prevent data exposure.

    Why it's wrong here

    Deleting the bucket is drastic and may cause data loss.

  • ✗

    Contact the root user to confirm the action.

    Why it's wrong here

    While communication is useful, the immediate priority is securing the bucket.

  • ✗

    Disable the root user's access keys.

    Why it's wrong here

    The root user does not have access keys by default; the event was from the console. Disabling keys does not address the current issue.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may focus on disabling the root user's access keys (Option D) because they associate root user actions with compromised credentials, but the real issue is the bucket policy itself—the root user intentionally or unintentionally made the bucket public, and the immediate fix is to revert that policy.

Detailed technical explanation

How to think about this question

When the root user applies a bucket policy with `Principal: "*"` and `Effect: "Allow"` on `s3:GetObject`, the bucket becomes publicly readable regardless of any block public access settings if those settings are not enabled. AWS S3 evaluates bucket policies and ACLs together; a bucket policy that explicitly grants public access overrides any default private settings. The `s3:PutBucketPolicy` API call is logged in CloudTrail with the `requestParameters` showing the policy document, which the engineer can inspect to confirm the exact permissions granted.

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.

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 SCS-C02 question test?

Management and Security Governance — This question tests Management and Security Governance — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Revert the bucket policy to remove the public access. — The CloudTrail event shows that the root user executed `s3:PutBucketPolicy` to apply a bucket policy that grants public access (e.g., `Principal: "*"` or `Effect: "Allow"` with `Action: "s3:GetObject"`). Reverting the bucket policy to remove public access is the immediate corrective action to stop unauthorized data exposure. This directly addresses the security issue by revoking the public read permissions that were just granted.

What should I do if I get this SCS-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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 11, 2026

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This SCS-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 SCS-C02 exam.