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Threat Detection and Incident Response →mediumMultiple ChoiceObjective-mapped

SCS-C02 Threat Detection and Incident Response Practice Question

This SCS-C02 practice question tests your understanding of threat detection and incident 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.

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/lambda/MyFunction:*"
    }
  ]
}

The above IAM policy is attached to an AWS Lambda function. The function is failing to write logs to CloudWatch Logs. What is the likely cause?

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/lambda/MyFunction:*"
    }
  ]
}

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 resource ARN does not include the log group itself; only log streams

The IAM policy grants `logs:CreateLogStream` and `logs:PutLogEvents` with a resource ARN that correctly targets log streams under the specified log group. However, the policy lacks any statement that grants permission on the log group resource itself. If the log group does not already exist, the Lambda function requires `logs:CreateLogGroup` permission on the log group ARN (`arn:aws:logs:us-east-1:123456789012:log-group:MyLogGroup`) to create it. Without this, the function cannot create the log group, causing the write to fail. The resource ARN in the policy does not include the log group itself, only log streams, which is why the function lacks the necessary permissions to interact with the log group resource.

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 resource ARN does not include the log group itself; only log streams

    Why this is correct

    PutLogEvents requires access to the log group resource as well.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The actions list does not include logs:DescribeLogGroups

    Why it's wrong here

    DescribeLogGroups is not required for writing logs.

  • ✗

    The policy is missing an explicit deny for other actions

    Why it's wrong here

    Explicit deny is not needed; default deny applies.

  • ✗

    The region in the ARN does not match the Lambda function's region

    Why it's wrong here

    The region matches us-east-1.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates focus on the actions (e.g., missing `logs:DescribeLogGroups`) rather than the resource ARN, which must include the log group itself (not just log streams) for the initial log group creation or access check.

Detailed technical explanation

How to think about this question

Under the hood, the AWS Lambda runtime uses the AWS SDK to call `CreateLogGroup` on the CloudWatch Logs service before any log stream operations. If the IAM policy only grants permissions on `log-stream` resources, the `CreateLogGroup` call (which targets the log group ARN) is denied by the implicit deny, resulting in an `AccessDeniedException`. This is a common misconfiguration because the CloudWatch Logs API requires separate resource-level permissions for the log group and log stream, and the log group ARN must be explicitly allowed for the initial creation or verification step.

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.

Quick reference

Cloud Service Model Comparison

ModelYou ManageProvider ManagesExamples
IaaSOS, runtime, apps, dataHardware, hypervisor, networkingEC2, Azure VMs, GCP Compute Engine
PaaSApps and dataOS, runtime, middleware, hardwareElastic Beanstalk, Azure App Service
SaaSData and settings onlyEverything elseMicrosoft 365, Salesforce, Workday
FaaS / ServerlessFunction code onlyInfra, scaling, runtimeLambda, Azure Functions, Cloud Run
CaaSContainers and appsKubernetes, OS, hardwareEKS, AKS, GKE

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?

Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The resource ARN does not include the log group itself; only log streams — The IAM policy grants `logs:CreateLogStream` and `logs:PutLogEvents` with a resource ARN that correctly targets log streams under the specified log group. However, the policy lacks any statement that grants permission on the log group resource itself. If the log group does not already exist, the Lambda function requires `logs:CreateLogGroup` permission on the log group ARN (`arn:aws:logs:us-east-1:123456789012:log-group:MyLogGroup`) to create it. Without this, the function cannot create the log group, causing the write to fail. The resource ARN in the policy does not include the log group itself, only log streams, which is why the function lacks the necessary permissions to interact with the log group resource.

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.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 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.